Ćirković, Predrag

 Authority Key Name Variants orcid::0000-0002-5865-1952 Ćirković, Predrag (564)

### Author's Bibliography

#### Measurement of the azimuthal anisotropy of Υ(1S) and Υ(2S) mesons in PbPb collisions at √sNN=5.02 TeV

(2021)

TY  - JOUR
AU  - Sirunyan, A.M.
AU  - Tumasyan, A.
AU  - Adam, W.
AU  - Ambrogi, F.
AU  - Bergauer, T.
AU  - Adzic, P.
AU  - Cirkovic, P.
AU  - Dordevic, M.
AU  - Milenovic, P.
AU  - Milosevic, J.
AU  - Stojanovic, M.
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/10005
AB  - The second-order Fourier coefficients (v2) characterizing the azimuthal distributions of Υ(1S)and Υ(2S)mesons produced in PbPb collisions at √sNN=5.02 TeV are studied. The Υmesons are reconstructed in their dimuon decay channel, as measured by the CMS detector. The collected data set corresponds to an integrated luminosity of 1.7nb−1. The scalar product method is used to extract the v2coefficients of the azimuthal distributions. Results are reported for the rapidity range |y| <2.4, in the transverse momentum interval 0 <pT<50 GeV/c, and in three centrality ranges of 10–30%, 30–50% and 50–90%. In contrast to the J/ψmesons, the measured v2values for the Υmesons are found to be consistent with zero.
T2  - Physics Letters B
T1  - Measurement of the azimuthal anisotropy of Υ(1S) and Υ(2S) mesons in PbPb collisions at √sNN=5.02 TeV
VL  - 819 C
DO  - 10.1016/j.physletb.2021.136385
ER  - 
@article{
author = "Sirunyan, A.M. and Tumasyan, A. and Adam, W. and Ambrogi, F. and Bergauer, T. and Adzic, P. and Cirkovic, P. and Dordevic, M. and Milenovic, P. and Milosevic, J. and Stojanovic, M.",
year = "2021",
abstract = "The second-order Fourier coefficients (v2) characterizing the azimuthal distributions of Υ(1S)and Υ(2S)mesons produced in PbPb collisions at √sNN=5.02 TeV are studied. The Υmesons are reconstructed in their dimuon decay channel, as measured by the CMS detector. The collected data set corresponds to an integrated luminosity of 1.7nb−1. The scalar product method is used to extract the v2coefficients of the azimuthal distributions. Results are reported for the rapidity range |y| <2.4, in the transverse momentum interval 0 <pT<50 GeV/c, and in three centrality ranges of 10–30%, 30–50% and 50–90%. In contrast to the J/ψmesons, the measured v2values for the Υmesons are found to be consistent with zero.",
journal = "Physics Letters B",
title = "Measurement of the azimuthal anisotropy of Υ(1S) and Υ(2S) mesons in PbPb collisions at √sNN=5.02 TeV",
volume = "819 C",
doi = "10.1016/j.physletb.2021.136385"
}
Sirunyan, A.M., Tumasyan, A., Adam, W., Ambrogi, F., Bergauer, T., Adzic, P., Cirkovic, P., Dordevic, M., Milenovic, P., Milosevic, J.,& Stojanovic, M.. (2021). Measurement of the azimuthal anisotropy of Υ(1S) and Υ(2S) mesons in PbPb collisions at √sNN=5.02 TeV. in Physics Letters B, 819 C.
https://doi.org/10.1016/j.physletb.2021.136385
Sirunyan A, Tumasyan A, Adam W, Ambrogi F, Bergauer T, Adzic P, Cirkovic P, Dordevic M, Milenovic P, Milosevic J, Stojanovic M. Measurement of the azimuthal anisotropy of Υ(1S) and Υ(2S) mesons in PbPb collisions at √sNN=5.02 TeV. in Physics Letters B. 2021;819 C.
doi:10.1016/j.physletb.2021.136385 .
Sirunyan, A.M., Tumasyan, A., Adam, W., Ambrogi, F., Bergauer, T., Adzic, P., Cirkovic, P., Dordevic, M., Milenovic, P., Milosevic, J., Stojanovic, M., "Measurement of the azimuthal anisotropy of Υ(1S) and Υ(2S) mesons in PbPb collisions at √sNN=5.02 TeV" in Physics Letters B, 819 C (2021),
https://doi.org/10.1016/j.physletb.2021.136385 . .
 2 1

#### Search for singly and pair-produced leptoquarks coupling to third-generation fermions in proton-proton collisions at s=13 TeV

(2021)

TY  - JOUR
AU  - Sirunyan, A.M.
AU  - Tumasyan, A.
AU  - Adam, W.
AU  - Bergauer, T.
AU  - Dragicevic, M.
AU  - Adzic, P.
AU  - Cirkovic, P.
AU  - Dordevic, M.
AU  - Milenovic, P.
AU  - Milosevic, J.
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/10004
AB  - A search for leptoquarks produced singly and in pairs in proton-proton collisions is presented. We consider the leptoquark (LQ) to be a scalar particle of charge −1/3e coupling to a top quark plus a tau lepton (tτ) or a bottom quark plus a neutrino (bν), or a vector particle of charge +2/3e, coupling to tν or bτ. These choices are motivated by models that can explain a series of anomalies observed in the measurement of B meson decays. In this analysis the signatures tτνb and tτν are probed, using data recorded by the CMS experiment at the CERN LHC at s=13 TeV and that correspond to an integrated luminosity of 137 fb$^{−1}$. These signatures have not been previously explored in a dedicated search. The data are found to be in agreement with the standard model prediction. Lower limits at 95% confidence level are set on the LQ mass in the range 0.98–1.73 TeV, depending on the LQ spin and its coupling λ to a lepton and a quark, and assuming equal couplings for the two LQ decay modes considered. These are the most stringent constraints to date on the existence of leptoquarks in this scenario.
T2  - Physics Letters B
T1  - Search for singly and pair-produced leptoquarks coupling to third-generation fermions in proton-proton collisions at s=13 TeV
VL  - 819 C
DO  - 10.1016/j.physletb.2021.136446
ER  - 
@article{
author = "Sirunyan, A.M. and Tumasyan, A. and Adam, W. and Bergauer, T. and Dragicevic, M. and Adzic, P. and Cirkovic, P. and Dordevic, M. and Milenovic, P. and Milosevic, J.",
year = "2021",
abstract = "A search for leptoquarks produced singly and in pairs in proton-proton collisions is presented. We consider the leptoquark (LQ) to be a scalar particle of charge −1/3e coupling to a top quark plus a tau lepton (tτ) or a bottom quark plus a neutrino (bν), or a vector particle of charge +2/3e, coupling to tν or bτ. These choices are motivated by models that can explain a series of anomalies observed in the measurement of B meson decays. In this analysis the signatures tτνb and tτν are probed, using data recorded by the CMS experiment at the CERN LHC at s=13 TeV and that correspond to an integrated luminosity of 137 fb$^{−1}$. These signatures have not been previously explored in a dedicated search. The data are found to be in agreement with the standard model prediction. Lower limits at 95% confidence level are set on the LQ mass in the range 0.98–1.73 TeV, depending on the LQ spin and its coupling λ to a lepton and a quark, and assuming equal couplings for the two LQ decay modes considered. These are the most stringent constraints to date on the existence of leptoquarks in this scenario.",
journal = "Physics Letters B",
title = "Search for singly and pair-produced leptoquarks coupling to third-generation fermions in proton-proton collisions at s=13 TeV",
volume = "819 C",
doi = "10.1016/j.physletb.2021.136446"
}
Sirunyan, A.M., Tumasyan, A., Adam, W., Bergauer, T., Dragicevic, M., Adzic, P., Cirkovic, P., Dordevic, M., Milenovic, P.,& Milosevic, J.. (2021). Search for singly and pair-produced leptoquarks coupling to third-generation fermions in proton-proton collisions at s=13 TeV. in Physics Letters B, 819 C.
https://doi.org/10.1016/j.physletb.2021.136446
Sirunyan A, Tumasyan A, Adam W, Bergauer T, Dragicevic M, Adzic P, Cirkovic P, Dordevic M, Milenovic P, Milosevic J. Search for singly and pair-produced leptoquarks coupling to third-generation fermions in proton-proton collisions at s=13 TeV. in Physics Letters B. 2021;819 C.
doi:10.1016/j.physletb.2021.136446 .
Sirunyan, A.M., Tumasyan, A., Adam, W., Bergauer, T., Dragicevic, M., Adzic, P., Cirkovic, P., Dordevic, M., Milenovic, P., Milosevic, J., "Search for singly and pair-produced leptoquarks coupling to third-generation fermions in proton-proton collisions at s=13 TeV" in Physics Letters B, 819 C (2021),
https://doi.org/10.1016/j.physletb.2021.136446 . .
 1 7

#### Search for the rare decay of the W boson into a pion and a photon in proton-proton collisions at

(2021)

TY  - JOUR
AU  - Sirunyan, A.M.
AU  - Tumasyan, A.
AU  - Adam, W.
AU  - Bergauer, T.
AU  - Dragicevic, M.
AU  - Adzic, P.
AU  - Cirkovic, P.
AU  - Dordevic, M.
AU  - Milenovic, P.
AU  - Milosevic, J.
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/10003
AB  - A search is performed for the rare decay W±→π±γ in proton-proton collisions at s=13TeV. Data corresponding to an integrated luminosity of 137fb−1 were collected during 2016 to 2018 with the CMS detector. This analysis exploits a novel search strategy based on W boson production in top quark pair events. An inclusive search for the W±→π±γ decay is not optimal at the LHC because of the high trigger thresholds. Instead, a trigger selection is exploited in which the W boson originating from one of the top quarks is used to tag the event in a leptonic decay. The W boson emerging from the other top quark is used to search for the W±→π±γ signature. Such decays are characterized by an isolated track pointing to a large energy deposit, and by an isolated photon of large transverse momentum. The presence of b quark jets reduces the background from the hadronization of light-flavor quarks and gluons. The W±→π±γ decay is not observed. An upper exclusion limit is set to this branching fraction, corresponding to 1.50×10−5 at 95% confidence level, whereas the expected upper exclusion limit is 0.85−0.29+0.52×10−5.
T2  - Physics Letters B
T1  - Search for the rare decay of the W boson into a pion and a photon in proton-proton collisions at
VL  - 819 C
DO  - 10.1016/j.physletb.2021.136409
ER  - 
@article{
author = "Sirunyan, A.M. and Tumasyan, A. and Adam, W. and Bergauer, T. and Dragicevic, M. and Adzic, P. and Cirkovic, P. and Dordevic, M. and Milenovic, P. and Milosevic, J.",
year = "2021",
abstract = "A search is performed for the rare decay W±→π±γ in proton-proton collisions at s=13TeV. Data corresponding to an integrated luminosity of 137fb−1 were collected during 2016 to 2018 with the CMS detector. This analysis exploits a novel search strategy based on W boson production in top quark pair events. An inclusive search for the W±→π±γ decay is not optimal at the LHC because of the high trigger thresholds. Instead, a trigger selection is exploited in which the W boson originating from one of the top quarks is used to tag the event in a leptonic decay. The W boson emerging from the other top quark is used to search for the W±→π±γ signature. Such decays are characterized by an isolated track pointing to a large energy deposit, and by an isolated photon of large transverse momentum. The presence of b quark jets reduces the background from the hadronization of light-flavor quarks and gluons. The W±→π±γ decay is not observed. An upper exclusion limit is set to this branching fraction, corresponding to 1.50×10−5 at 95% confidence level, whereas the expected upper exclusion limit is 0.85−0.29+0.52×10−5.",
journal = "Physics Letters B",
title = "Search for the rare decay of the W boson into a pion and a photon in proton-proton collisions at",
volume = "819 C",
doi = "10.1016/j.physletb.2021.136409"
}
Sirunyan, A.M., Tumasyan, A., Adam, W., Bergauer, T., Dragicevic, M., Adzic, P., Cirkovic, P., Dordevic, M., Milenovic, P.,& Milosevic, J.. (2021). Search for the rare decay of the W boson into a pion and a photon in proton-proton collisions at. in Physics Letters B, 819 C.
https://doi.org/10.1016/j.physletb.2021.136409
Sirunyan A, Tumasyan A, Adam W, Bergauer T, Dragicevic M, Adzic P, Cirkovic P, Dordevic M, Milenovic P, Milosevic J. Search for the rare decay of the W boson into a pion and a photon in proton-proton collisions at. in Physics Letters B. 2021;819 C.
doi:10.1016/j.physletb.2021.136409 .
Sirunyan, A.M., Tumasyan, A., Adam, W., Bergauer, T., Dragicevic, M., Adzic, P., Cirkovic, P., Dordevic, M., Milenovic, P., Milosevic, J., "Search for the rare decay of the W boson into a pion and a photon in proton-proton collisions at" in Physics Letters B, 819 C (2021),
https://doi.org/10.1016/j.physletb.2021.136409 . .
 1 1

#### MUSiC: a model-unspecific search for new physics in proton–proton collisions at √s=13TeV

(2021)

TY  - JOUR
AU  - Sirunyan, A.
AU  - Tumasyan, A.
AU  - Adam, W.
AU  - Ambrogi, F.
AU  - Bergauer, T.
AU  - Adžić, Petar
AU  - Ćirković, Predrag
AU  - Đorđević, Miloš
AU  - Milenović, Predrag
AU  - Milošević, Jovan
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9988
AB  - Results of the Model Unspecific Search in CMS (MUSiC), using proton–proton collision data recorded at the LHC at a centre-of-mass energy of 13 $$\,\text {TeV}$$     TeV    , corresponding to an integrated luminosity of 35.9 $$\,\text {fb}^{-1}$$      fb  - 1      , are presented. The MUSiC analysis searches for anomalies that could be signatures of physics beyond the standard model. The analysis is based on the comparison of observed data with the standard model prediction, as determined from simulation, in several hundred final states and multiple kinematic distributions. Events containing at least one electron or muon are classified based on their final state topology, and an automated search algorithm surveys the observed data for deviations from the prediction. The sensitivity of the search is validated using multiple methods. No significant deviations from the predictions have been observed. For a wide range of final state topologies, agreement is found between the data and the standard model simulation. This analysis complements dedicated search analyses by significantly expanding the range of final states covered using a model independent approach with the largest data set to date to probe phase space regions beyond the reach of previous general searches.
T2  - European Physical Journal C
T1  - MUSiC: a model-unspecific search for new physics in proton–proton collisions at √s=13TeV
VL  - 81
IS  - 7
SP  - 629
DO  - 10.1140/epjc/s10052-021-09236-z
ER  - 
@article{
author = "Sirunyan, A. and Tumasyan, A. and Adam, W. and Ambrogi, F. and Bergauer, T. and Adžić, Petar and Ćirković, Predrag and Đorđević, Miloš and Milenović, Predrag and Milošević, Jovan",
year = "2021",
abstract = "Results of the Model Unspecific Search in CMS (MUSiC), using proton–proton collision data recorded at the LHC at a centre-of-mass energy of 13 $$\,\text {TeV}$$     TeV    , corresponding to an integrated luminosity of 35.9 $$\,\text {fb}^{-1}$$      fb  - 1      , are presented. The MUSiC analysis searches for anomalies that could be signatures of physics beyond the standard model. The analysis is based on the comparison of observed data with the standard model prediction, as determined from simulation, in several hundred final states and multiple kinematic distributions. Events containing at least one electron or muon are classified based on their final state topology, and an automated search algorithm surveys the observed data for deviations from the prediction. The sensitivity of the search is validated using multiple methods. No significant deviations from the predictions have been observed. For a wide range of final state topologies, agreement is found between the data and the standard model simulation. This analysis complements dedicated search analyses by significantly expanding the range of final states covered using a model independent approach with the largest data set to date to probe phase space regions beyond the reach of previous general searches.",
journal = "European Physical Journal C",
title = "MUSiC: a model-unspecific search for new physics in proton–proton collisions at √s=13TeV",
volume = "81",
number = "7",
pages = "629",
doi = "10.1140/epjc/s10052-021-09236-z"
}
Sirunyan, A., Tumasyan, A., Adam, W., Ambrogi, F., Bergauer, T., Adžić, P., Ćirković, P., Đorđević, M., Milenović, P.,& Milošević, J.. (2021). MUSiC: a model-unspecific search for new physics in proton–proton collisions at √s=13TeV. in European Physical Journal C, 81(7), 629.
https://doi.org/10.1140/epjc/s10052-021-09236-z
Sirunyan A, Tumasyan A, Adam W, Ambrogi F, Bergauer T, Adžić P, Ćirković P, Đorđević M, Milenović P, Milošević J. MUSiC: a model-unspecific search for new physics in proton–proton collisions at √s=13TeV. in European Physical Journal C. 2021;81(7):629.
doi:10.1140/epjc/s10052-021-09236-z .
Sirunyan, A., Tumasyan, A., Adam, W., Ambrogi, F., Bergauer, T., Adžić, Petar, Ćirković, Predrag, Đorđević, Miloš, Milenović, Predrag, Milošević, Jovan, "MUSiC: a model-unspecific search for new physics in proton–proton collisions at √s=13TeV" in European Physical Journal C, 81, no. 7 (2021):629,
https://doi.org/10.1140/epjc/s10052-021-09236-z . .
 1 1

#### First measurement of large area jet transverse momentum spectra in heavy-ion collisions

(2021)

TY  - JOUR
AU  - Sirunyan, A. M.
AU  - Tumasyan, A.
AU  - Adam, W.
AU  - Ambrogi, F.
AU  - Bergauer, T.
AU  - Adžić, Petar
AU  - Ćirković, Predrag
AU  - Đorđević, Miloš
AU  - Milenović, Predrag
AU  - Milošević, Jovan
AU  - Stojanović, Milan
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9864
AB  - Jet production in lead-lead (PbPb) and proton-proton (pp) collisions at a nucleon-nucleon center-of-mass energy of 5.02 TeV is studied with the CMS detector at the LHC, using PbPb and pp data samples corresponding to integrated luminosities of 404 μb −1 and 27.4 pb −1, respectively. Jets with different areas are reconstructed using the anti-k T algorithm by varying the distance parameter R. The measurements are performed using jets with transverse momenta (p T) greater than 200 GeV and in a pseudorapidity range of |η| < 2. To reveal the medium modification of the jet spectra in PbPb collisions, the properly normalized ratio of spectra from PbPb and pp data is used to extract jet nuclear modification factors as functions of the PbPb collision centrality, p T and, for the first time, as a function of R up to 1.0. For the most central collisions, a strong suppression is observed for high-p T jets reconstructed with all distance parameters, implying that a significant amount of jet energy is scattered to large angles. The dependence of jet suppression on R is expected to be sensitive to both the jet energy loss mechanism and the medium response, and so the data are compared to several modern event generators and analytic calculations. The models considered do not fully reproduce the data.
T2  - Journal of High Energy Physics
T1  - First measurement of large area jet transverse momentum spectra in heavy-ion collisions
VL  - 2021
IS  - 5
SP  - 284
DO  - 10.1007/JHEP05(2021)284
ER  - 
@article{
author = "Sirunyan, A. M. and Tumasyan, A. and Adam, W. and Ambrogi, F. and Bergauer, T. and Adžić, Petar and Ćirković, Predrag and Đorđević, Miloš and Milenović, Predrag and Milošević, Jovan and Stojanović, Milan",
year = "2021",
abstract = "Jet production in lead-lead (PbPb) and proton-proton (pp) collisions at a nucleon-nucleon center-of-mass energy of 5.02 TeV is studied with the CMS detector at the LHC, using PbPb and pp data samples corresponding to integrated luminosities of 404 μb −1 and 27.4 pb −1, respectively. Jets with different areas are reconstructed using the anti-k T algorithm by varying the distance parameter R. The measurements are performed using jets with transverse momenta (p T) greater than 200 GeV and in a pseudorapidity range of |η| < 2. To reveal the medium modification of the jet spectra in PbPb collisions, the properly normalized ratio of spectra from PbPb and pp data is used to extract jet nuclear modification factors as functions of the PbPb collision centrality, p T and, for the first time, as a function of R up to 1.0. For the most central collisions, a strong suppression is observed for high-p T jets reconstructed with all distance parameters, implying that a significant amount of jet energy is scattered to large angles. The dependence of jet suppression on R is expected to be sensitive to both the jet energy loss mechanism and the medium response, and so the data are compared to several modern event generators and analytic calculations. The models considered do not fully reproduce the data.",
journal = "Journal of High Energy Physics",
title = "First measurement of large area jet transverse momentum spectra in heavy-ion collisions",
volume = "2021",
number = "5",
pages = "284",
doi = "10.1007/JHEP05(2021)284"
}
Sirunyan, A. M., Tumasyan, A., Adam, W., Ambrogi, F., Bergauer, T., Adžić, P., Ćirković, P., Đorđević, M., Milenović, P., Milošević, J.,& Stojanović, M.. (2021). First measurement of large area jet transverse momentum spectra in heavy-ion collisions. in Journal of High Energy Physics, 2021(5), 284.
https://doi.org/10.1007/JHEP05(2021)284
Sirunyan AM, Tumasyan A, Adam W, Ambrogi F, Bergauer T, Adžić P, Ćirković P, Đorđević M, Milenović P, Milošević J, Stojanović M. First measurement of large area jet transverse momentum spectra in heavy-ion collisions. in Journal of High Energy Physics. 2021;2021(5):284.
doi:10.1007/JHEP05(2021)284 .
Sirunyan, A. M., Tumasyan, A., Adam, W., Ambrogi, F., Bergauer, T., Adžić, Petar, Ćirković, Predrag, Đorđević, Miloš, Milenović, Predrag, Milošević, Jovan, Stojanović, Milan, "First measurement of large area jet transverse momentum spectra in heavy-ion collisions" in Journal of High Energy Physics, 2021, no. 5 (2021):284,
https://doi.org/10.1007/JHEP05(2021)284 . .
 6 1 2

#### Study of Drell-Yan dimuon production in proton-lead collisions at √sNN = 8.16 TeV

(2021)

TY  - JOUR
AU  - Sirunyan, A. M.
AU  - Tumasyan, A.
AU  - Adam, W.
AU  - Ambrogi, F.
AU  - Bergauer, T.
AU  - Adžić, Petar
AU  - Ćirković, Predrag
AU  - Đorđević, Miloš
AU  - Milenović, Predrag
AU  - Milošević, Jovan
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9862
AB  - Differential cross sections for the Drell-Yan process, including Z boson production, using the dimuon decay channel are measured in proton-lead (pPb) collisions at a nucleon-nucleon centre-of-mass energy of 8.16 TeV. A data sample recorded with the CMS detector at the LHC is used, corresponding to an integrated luminosity of 173 nb −1. The differential cross section as a function of the dimuon mass is measured in the range 15–600 GeV, for the first time in proton-nucleus collisions. It is also reported as a function of dimuon rapidity over the mass ranges 15–60 GeV and 60–120 GeV, and ratios for the p-going over the Pb-going beam directions are built. In both mass ranges, the differential cross sections as functions of the dimuon transverse momentum p T and of a geometric variable ϕ * are measured, where ϕ * highly correlates with p T but is determined with higher precision. In the Z mass region, the rapidity dependence of the data indicate a modification of the distribution of partons within a lead nucleus as compared to the proton case. The data are more precise than predictions based upon current models of parton distributions.
T2  - Journal of High Energy Physics
T1  - Study of Drell-Yan dimuon production in proton-lead collisions at √sNN = 8.16 TeV
VL  - 2021
IS  - 5
SP  - 182
DO  - 10.1007/JHEP05(2021)182
ER  - 
@article{
author = "Sirunyan, A. M. and Tumasyan, A. and Adam, W. and Ambrogi, F. and Bergauer, T. and Adžić, Petar and Ćirković, Predrag and Đorđević, Miloš and Milenović, Predrag and Milošević, Jovan",
year = "2021",
abstract = "Differential cross sections for the Drell-Yan process, including Z boson production, using the dimuon decay channel are measured in proton-lead (pPb) collisions at a nucleon-nucleon centre-of-mass energy of 8.16 TeV. A data sample recorded with the CMS detector at the LHC is used, corresponding to an integrated luminosity of 173 nb −1. The differential cross section as a function of the dimuon mass is measured in the range 15–600 GeV, for the first time in proton-nucleus collisions. It is also reported as a function of dimuon rapidity over the mass ranges 15–60 GeV and 60–120 GeV, and ratios for the p-going over the Pb-going beam directions are built. In both mass ranges, the differential cross sections as functions of the dimuon transverse momentum p T and of a geometric variable ϕ * are measured, where ϕ * highly correlates with p T but is determined with higher precision. In the Z mass region, the rapidity dependence of the data indicate a modification of the distribution of partons within a lead nucleus as compared to the proton case. The data are more precise than predictions based upon current models of parton distributions.",
journal = "Journal of High Energy Physics",
title = "Study of Drell-Yan dimuon production in proton-lead collisions at √sNN = 8.16 TeV",
volume = "2021",
number = "5",
pages = "182",
doi = "10.1007/JHEP05(2021)182"
}
Sirunyan, A. M., Tumasyan, A., Adam, W., Ambrogi, F., Bergauer, T., Adžić, P., Ćirković, P., Đorđević, M., Milenović, P.,& Milošević, J.. (2021). Study of Drell-Yan dimuon production in proton-lead collisions at √sNN = 8.16 TeV. in Journal of High Energy Physics, 2021(5), 182.
https://doi.org/10.1007/JHEP05(2021)182
Sirunyan AM, Tumasyan A, Adam W, Ambrogi F, Bergauer T, Adžić P, Ćirković P, Đorđević M, Milenović P, Milošević J. Study of Drell-Yan dimuon production in proton-lead collisions at √sNN = 8.16 TeV. in Journal of High Energy Physics. 2021;2021(5):182.
doi:10.1007/JHEP05(2021)182 .
Sirunyan, A. M., Tumasyan, A., Adam, W., Ambrogi, F., Bergauer, T., Adžić, Petar, Ćirković, Predrag, Đorđević, Miloš, Milenović, Predrag, Milošević, Jovan, "Study of Drell-Yan dimuon production in proton-lead collisions at √sNN = 8.16 TeV" in Journal of High Energy Physics, 2021, no. 5 (2021):182,
https://doi.org/10.1007/JHEP05(2021)182 . .

#### Measurements of the differential cross sections of the production of Z + jets and γ + jets and of Z boson emission collinear with a jet in pp collisions at √s = 13 TeV

(2021)

TY  - JOUR
AU  - Sirunyan, A. M.
AU  - Tumasyan, A.
AU  - Adam, W.
AU  - Ambrogi, F.
AU  - Bergauer, T.
AU  - Adžić, Petar
AU  - Ćirković, Predrag
AU  - Đorđević, Miloš
AU  - Milenović, Predrag
AU  - Milošević, Jovan
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9856
AB  - Measurements of the differential cross sections of Z + jets and γ + jets production, and their ratio, are presented as a function of the boson transverse momentum. Measurements are also presented of the angular distribution between the Z boson and the closest jet. The analysis is based on pp collisions at a center-of-mass energy of 13 TeV corresponding to an integrated luminosity of 35.9 fb −1 recorded by the CMS experiment at the LHC. The results, corrected for detector effects, are compared with various theoretical predictions. In general, the predictions at higher orders in perturbation theory show better agreement with the measurements. This work provides the first measurement of the ratio of the differential cross sections of Z + jets and γ + jets production at 13 TeV, as well as the first direct measurement of Z bosons emitted collinearly with a jet.
T2  - Journal of High Energy Physics
T1  - Measurements of the differential cross sections of the production of Z + jets and γ + jets and of Z boson emission collinear with a jet in pp collisions at √s = 13 TeV
VL  - 2021
IS  - 5
SP  - 285
DO  - 10.1007/JHEP05(2021)285
ER  - 
@article{
author = "Sirunyan, A. M. and Tumasyan, A. and Adam, W. and Ambrogi, F. and Bergauer, T. and Adžić, Petar and Ćirković, Predrag and Đorđević, Miloš and Milenović, Predrag and Milošević, Jovan",
year = "2021",
abstract = "Measurements of the differential cross sections of Z + jets and γ + jets production, and their ratio, are presented as a function of the boson transverse momentum. Measurements are also presented of the angular distribution between the Z boson and the closest jet. The analysis is based on pp collisions at a center-of-mass energy of 13 TeV corresponding to an integrated luminosity of 35.9 fb −1 recorded by the CMS experiment at the LHC. The results, corrected for detector effects, are compared with various theoretical predictions. In general, the predictions at higher orders in perturbation theory show better agreement with the measurements. This work provides the first measurement of the ratio of the differential cross sections of Z + jets and γ + jets production at 13 TeV, as well as the first direct measurement of Z bosons emitted collinearly with a jet.",
journal = "Journal of High Energy Physics",
title = "Measurements of the differential cross sections of the production of Z + jets and γ + jets and of Z boson emission collinear with a jet in pp collisions at √s = 13 TeV",
volume = "2021",
number = "5",
pages = "285",
doi = "10.1007/JHEP05(2021)285"
}
Sirunyan, A. M., Tumasyan, A., Adam, W., Ambrogi, F., Bergauer, T., Adžić, P., Ćirković, P., Đorđević, M., Milenović, P.,& Milošević, J.. (2021). Measurements of the differential cross sections of the production of Z + jets and γ + jets and of Z boson emission collinear with a jet in pp collisions at √s = 13 TeV. in Journal of High Energy Physics, 2021(5), 285.
https://doi.org/10.1007/JHEP05(2021)285
Sirunyan AM, Tumasyan A, Adam W, Ambrogi F, Bergauer T, Adžić P, Ćirković P, Đorđević M, Milenović P, Milošević J. Measurements of the differential cross sections of the production of Z + jets and γ + jets and of Z boson emission collinear with a jet in pp collisions at √s = 13 TeV. in Journal of High Energy Physics. 2021;2021(5):285.
doi:10.1007/JHEP05(2021)285 .
Sirunyan, A. M., Tumasyan, A., Adam, W., Ambrogi, F., Bergauer, T., Adžić, Petar, Ćirković, Predrag, Đorđević, Miloš, Milenović, Predrag, Milošević, Jovan, "Measurements of the differential cross sections of the production of Z + jets and γ + jets and of Z boson emission collinear with a jet in pp collisions at √s = 13 TeV" in Journal of High Energy Physics, 2021, no. 5 (2021):285,
https://doi.org/10.1007/JHEP05(2021)285 . .

#### Measurement of b jet shapes in proton-proton collisions at √s = 5.02 TeV

(2021)

TY  - JOUR
AU  - Sirunyan, A. M.
AU  - Tumasyan, A.
AU  - Adam, W.
AU  - Ambrogi, F.
AU  - Bergauer, T.
AU  - Adžić, Petar
AU  - Ćirković, Predrag
AU  - Đorđević, Miloš
AU  - Milenović, Predrag
AU  - Milošević, Jovan
AU  - Stojanović, Milan
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9852
AB  - We present the first study of charged-hadron production associated with jets originating from b quarks in proton-proton collisions at a center-of-mass energy of 5.02 TeV. The data sample used in this study was collected with the CMS detector at the CERN LHC and corresponds to an integrated luminosity of 27.4 pb −1. To characterize the jet substructure, the differential jet shapes, defined as the normalized transverse momentum distribution of charged hadrons as a function of angular distance from the jet axis, are measured for b jets. In addition to the jet shapes, the per-jet yields of charged particles associated with b jets are also quantified, again as a function of the angular distance with respect to the jet axis. Extracted jet shape and particle yield distributions for b jets are compared with results for inclusive jets, as well as with the predictions from the pythia and herwig++ event generators.
T2  - Journal of High Energy Physics
T1  - Measurement of b jet shapes in proton-proton collisions at √s = 5.02 TeV
VL  - 2021
IS  - 5
SP  - 54
DO  - 10.1007/JHEP05(2021)054
ER  - 
@article{
author = "Sirunyan, A. M. and Tumasyan, A. and Adam, W. and Ambrogi, F. and Bergauer, T. and Adžić, Petar and Ćirković, Predrag and Đorđević, Miloš and Milenović, Predrag and Milošević, Jovan and Stojanović, Milan",
year = "2021",
abstract = "We present the first study of charged-hadron production associated with jets originating from b quarks in proton-proton collisions at a center-of-mass energy of 5.02 TeV. The data sample used in this study was collected with the CMS detector at the CERN LHC and corresponds to an integrated luminosity of 27.4 pb −1. To characterize the jet substructure, the differential jet shapes, defined as the normalized transverse momentum distribution of charged hadrons as a function of angular distance from the jet axis, are measured for b jets. In addition to the jet shapes, the per-jet yields of charged particles associated with b jets are also quantified, again as a function of the angular distance with respect to the jet axis. Extracted jet shape and particle yield distributions for b jets are compared with results for inclusive jets, as well as with the predictions from the pythia and herwig++ event generators.",
journal = "Journal of High Energy Physics",
title = "Measurement of b jet shapes in proton-proton collisions at √s = 5.02 TeV",
volume = "2021",
number = "5",
pages = "54",
doi = "10.1007/JHEP05(2021)054"
}
Sirunyan, A. M., Tumasyan, A., Adam, W., Ambrogi, F., Bergauer, T., Adžić, P., Ćirković, P., Đorđević, M., Milenović, P., Milošević, J.,& Stojanović, M.. (2021). Measurement of b jet shapes in proton-proton collisions at √s = 5.02 TeV. in Journal of High Energy Physics, 2021(5), 54.
https://doi.org/10.1007/JHEP05(2021)054
Sirunyan AM, Tumasyan A, Adam W, Ambrogi F, Bergauer T, Adžić P, Ćirković P, Đorđević M, Milenović P, Milošević J, Stojanović M. Measurement of b jet shapes in proton-proton collisions at √s = 5.02 TeV. in Journal of High Energy Physics. 2021;2021(5):54.
doi:10.1007/JHEP05(2021)054 .
Sirunyan, A. M., Tumasyan, A., Adam, W., Ambrogi, F., Bergauer, T., Adžić, Petar, Ćirković, Predrag, Đorđević, Miloš, Milenović, Predrag, Milošević, Jovan, Stojanović, Milan, "Measurement of b jet shapes in proton-proton collisions at √s = 5.02 TeV" in Journal of High Energy Physics, 2021, no. 5 (2021):54,
https://doi.org/10.1007/JHEP05(2021)054 . .

#### Measurement of the Higgs boson production rate in association with top quarks in final states with electrons, muons, and hadronically decaying tau leptons at √s=13Te

(2021)

TY  - JOUR
AU  - Sirunyan, A. M.
AU  - Tumasyan, A.
AU  - Adam, W.
AU  - Bergauer, T.
AU  - Dragicevic, M.
AU  - Adžić, Petar
AU  - Ćirković, Predrag
AU  - Đorđević, Miloš
AU  - Milenović, Predrag
AU  - Milošević, Jovan
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9703
AB  - The rate for Higgs (H) bosons production in association with either one (t H) or two (t t ¯ H) top quarks is measured in final states containing multiple electrons, muons, or tau leptons decaying to hadrons and a neutrino, using proton–proton collisions recorded at a center-of-mass energy of 13Te by the CMS experiment. The analyzed data correspond to an integrated luminosity of 137fb-1. The analysis is aimed at events that contain H → W W , H → τ τ , or H → Z Z decays and each of the top quark(s) decays either to lepton+jets or all-jet channels. Sensitivity to signal is maximized by including ten signatures in the analysis, depending on the lepton multiplicity. The separation among t H , t t ¯ H , and the backgrounds is enhanced through machine-learning techniques and matrix-element methods. The measured production rates for the t t ¯ H and t H signals correspond to 0.92±0.19(stat)-0.13+0.17(syst) and 5.7±2.7(stat)±3.0(syst) of their respective standard model (SM) expectations. The corresponding observed (expected) significance amounts to 4.7 (5.2) standard deviations for t t ¯ H , and to 1.4 (0.3) for t H production. Assuming that the Higgs boson coupling to the tau lepton is equal in strength to its expectation in the SM, the coupling yt of the Higgs boson to the top quark divided by its SM expectation, κt=yt/ytSM, is constrained to be within - 0.9 < κt< - 0.7 or 0.7 < κt< 1.1 , at 95% confidence level. This result is the most sensitive measurement of the t t ¯ H production rate to date.
T2  - European Physical Journal C
T1  - Measurement of the Higgs boson production rate in association with top quarks in final states with electrons, muons, and hadronically decaying tau leptons at √s=13Te
VL  - 81
IS  - 4
SP  - 378
DO  - 10.1140/epjc/s10052-021-09014-x
ER  - 
@article{
author = "Sirunyan, A. M. and Tumasyan, A. and Adam, W. and Bergauer, T. and Dragicevic, M. and Adžić, Petar and Ćirković, Predrag and Đorđević, Miloš and Milenović, Predrag and Milošević, Jovan",
year = "2021",
abstract = "The rate for Higgs (H) bosons production in association with either one (t H) or two (t t ¯ H) top quarks is measured in final states containing multiple electrons, muons, or tau leptons decaying to hadrons and a neutrino, using proton–proton collisions recorded at a center-of-mass energy of 13Te by the CMS experiment. The analyzed data correspond to an integrated luminosity of 137fb-1. The analysis is aimed at events that contain H → W W , H → τ τ , or H → Z Z decays and each of the top quark(s) decays either to lepton+jets or all-jet channels. Sensitivity to signal is maximized by including ten signatures in the analysis, depending on the lepton multiplicity. The separation among t H , t t ¯ H , and the backgrounds is enhanced through machine-learning techniques and matrix-element methods. The measured production rates for the t t ¯ H and t H signals correspond to 0.92±0.19(stat)-0.13+0.17(syst) and 5.7±2.7(stat)±3.0(syst) of their respective standard model (SM) expectations. The corresponding observed (expected) significance amounts to 4.7 (5.2) standard deviations for t t ¯ H , and to 1.4 (0.3) for t H production. Assuming that the Higgs boson coupling to the tau lepton is equal in strength to its expectation in the SM, the coupling yt of the Higgs boson to the top quark divided by its SM expectation, κt=yt/ytSM, is constrained to be within - 0.9 < κt< - 0.7 or 0.7 < κt< 1.1 , at 95% confidence level. This result is the most sensitive measurement of the t t ¯ H production rate to date.",
journal = "European Physical Journal C",
title = "Measurement of the Higgs boson production rate in association with top quarks in final states with electrons, muons, and hadronically decaying tau leptons at √s=13Te",
volume = "81",
number = "4",
pages = "378",
doi = "10.1140/epjc/s10052-021-09014-x"
}
Sirunyan, A. M., Tumasyan, A., Adam, W., Bergauer, T., Dragicevic, M., Adžić, P., Ćirković, P., Đorđević, M., Milenović, P.,& Milošević, J.. (2021). Measurement of the Higgs boson production rate in association with top quarks in final states with electrons, muons, and hadronically decaying tau leptons at √s=13Te. in European Physical Journal C, 81(4), 378.
https://doi.org/10.1140/epjc/s10052-021-09014-x
Sirunyan AM, Tumasyan A, Adam W, Bergauer T, Dragicevic M, Adžić P, Ćirković P, Đorđević M, Milenović P, Milošević J. Measurement of the Higgs boson production rate in association with top quarks in final states with electrons, muons, and hadronically decaying tau leptons at √s=13Te. in European Physical Journal C. 2021;81(4):378.
doi:10.1140/epjc/s10052-021-09014-x .
Sirunyan, A. M., Tumasyan, A., Adam, W., Bergauer, T., Dragicevic, M., Adžić, Petar, Ćirković, Predrag, Đorđević, Miloš, Milenović, Predrag, Milošević, Jovan, "Measurement of the Higgs boson production rate in association with top quarks in final states with electrons, muons, and hadronically decaying tau leptons at √s=13Te" in European Physical Journal C, 81, no. 4 (2021):378,
https://doi.org/10.1140/epjc/s10052-021-09014-x . .
 1 4 5

#### Erratum to: Search for dark matter produced in association with a leptonically decaying Z boson in proton–proton collisions at s = 13 Te (The European Physical Journal C, (2021), 81, 1, (13), 10.1140/epjc/s10052-020-08739-5)

(2021)

TY  - JOUR
AU  - Sirunyan, A. M.
AU  - Tumasyan, A.
AU  - Adam, W.
AU  - Bergauer, T.
AU  - Dragicevic, M.
AU  - Adžić, Petar
AU  - Ćirković, Predrag
AU  - Đorđević, Miloš
AU  - Milenović, Predrag
AU  - Milošević, Jovan
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9653
AB  - A Correction to this paper has been published: https://doi.org/10.1140/epjc/s10052-020-08739-5
T2  - European Physical Journal C
T1  - Erratum to: Search for dark matter produced in association with a leptonically decaying Z boson in proton–proton collisions at s = 13 Te (The European Physical Journal C, (2021), 81, 1, (13), 10.1140/epjc/s10052-020-08739-5)
VL  - 81
IS  - 4
SP  - 333
DO  - 10.1140/epjc/s10052-021-08959-3
ER  - 
@article{
author = "Sirunyan, A. M. and Tumasyan, A. and Adam, W. and Bergauer, T. and Dragicevic, M. and Adžić, Petar and Ćirković, Predrag and Đorđević, Miloš and Milenović, Predrag and Milošević, Jovan",
year = "2021",
abstract = "A Correction to this paper has been published: https://doi.org/10.1140/epjc/s10052-020-08739-5",
journal = "European Physical Journal C",
title = "Erratum to: Search for dark matter produced in association with a leptonically decaying Z boson in proton–proton collisions at s = 13 Te (The European Physical Journal C, (2021), 81, 1, (13), 10.1140/epjc/s10052-020-08739-5)",
volume = "81",
number = "4",
pages = "333",
doi = "10.1140/epjc/s10052-021-08959-3"
}
Sirunyan, A. M., Tumasyan, A., Adam, W., Bergauer, T., Dragicevic, M., Adžić, P., Ćirković, P., Đorđević, M., Milenović, P.,& Milošević, J.. (2021). Erratum to: Search for dark matter produced in association with a leptonically decaying Z boson in proton–proton collisions at s = 13 Te (The European Physical Journal C, (2021), 81, 1, (13), 10.1140/epjc/s10052-020-08739-5). in European Physical Journal C, 81(4), 333.
https://doi.org/10.1140/epjc/s10052-021-08959-3
Sirunyan AM, Tumasyan A, Adam W, Bergauer T, Dragicevic M, Adžić P, Ćirković P, Đorđević M, Milenović P, Milošević J. Erratum to: Search for dark matter produced in association with a leptonically decaying Z boson in proton–proton collisions at s = 13 Te (The European Physical Journal C, (2021), 81, 1, (13), 10.1140/epjc/s10052-020-08739-5). in European Physical Journal C. 2021;81(4):333.
doi:10.1140/epjc/s10052-021-08959-3 .
Sirunyan, A. M., Tumasyan, A., Adam, W., Bergauer, T., Dragicevic, M., Adžić, Petar, Ćirković, Predrag, Đorđević, Miloš, Milenović, Predrag, Milošević, Jovan, "Erratum to: Search for dark matter produced in association with a leptonically decaying Z boson in proton–proton collisions at s = 13 Te (The European Physical Journal C, (2021), 81, 1, (13), 10.1140/epjc/s10052-020-08739-5)" in European Physical Journal C, 81, no. 4 (2021):333,
https://doi.org/10.1140/epjc/s10052-021-08959-3 . .
 1 2 1

#### Measurement of differential cross sections for Z bosons produced in association with charm jets in pp collisions at √s = 13 TeV

(2021)

TY  - JOUR
AU  - Sirunyan, A. M.
AU  - Tumasyan, A.
AU  - Adam, W.
AU  - Bergauer, T.
AU  - Dragicevic, M.
AU  - Adžić, Petar
AU  - Ćirković, Predrag
AU  - Đorđević, Miloš
AU  - Milenović, Predrag
AU  - Milošević, Jovan
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9651
AB  - Measurements are presented of differential cross sections for the production of Z bosons in association with at least one jet initiated by a charm quark in pp collisions at s = 13 TeV. The data recorded by the CMS experiment at the LHC correspond to an integrated luminosity of 35.9 fb−1. The final states contain a pair of electrons or muons that are the decay products of a Z boson, and a jet consistent with being initiated by a charm quark produced in the hard interaction. Differential cross sections as a function of the transverse momentum pT of the Z boson and pT of the charm jet are compared with predictions from Monte Carlo event generators. The inclusive production cross section 405.4 ± 5.6 (stat) ± 24.3 (exp) ± 3.7 (theo) pb, is measured in a fiducial region requiring both leptons to have pseudorapidity |η| < 2.4 and pT> 10 GeV, at least one lepton with pT> 26 GeV, and a mass of the pair in the range 71–111 GeV, while the charm jet is required to have pT> 30 GeV and |η| < 2.4. These are the first measurements of these cross sections in proton-proton collisions at 13 TeV.
T2  - Journal of High Energy Physics
T1  - Measurement of differential cross sections for Z bosons produced in association with charm jets in pp collisions at √s = 13 TeV
VL  - 2021
IS  - 4
SP  - 109
DO  - 10.1007/JHEP04(2021)109
ER  - 
@article{
author = "Sirunyan, A. M. and Tumasyan, A. and Adam, W. and Bergauer, T. and Dragicevic, M. and Adžić, Petar and Ćirković, Predrag and Đorđević, Miloš and Milenović, Predrag and Milošević, Jovan",
year = "2021",
abstract = "Measurements are presented of differential cross sections for the production of Z bosons in association with at least one jet initiated by a charm quark in pp collisions at s = 13 TeV. The data recorded by the CMS experiment at the LHC correspond to an integrated luminosity of 35.9 fb−1. The final states contain a pair of electrons or muons that are the decay products of a Z boson, and a jet consistent with being initiated by a charm quark produced in the hard interaction. Differential cross sections as a function of the transverse momentum pT of the Z boson and pT of the charm jet are compared with predictions from Monte Carlo event generators. The inclusive production cross section 405.4 ± 5.6 (stat) ± 24.3 (exp) ± 3.7 (theo) pb, is measured in a fiducial region requiring both leptons to have pseudorapidity |η| < 2.4 and pT> 10 GeV, at least one lepton with pT> 26 GeV, and a mass of the pair in the range 71–111 GeV, while the charm jet is required to have pT> 30 GeV and |η| < 2.4. These are the first measurements of these cross sections in proton-proton collisions at 13 TeV.",
journal = "Journal of High Energy Physics",
title = "Measurement of differential cross sections for Z bosons produced in association with charm jets in pp collisions at √s = 13 TeV",
volume = "2021",
number = "4",
pages = "109",
doi = "10.1007/JHEP04(2021)109"
}
Sirunyan, A. M., Tumasyan, A., Adam, W., Bergauer, T., Dragicevic, M., Adžić, P., Ćirković, P., Đorđević, M., Milenović, P.,& Milošević, J.. (2021). Measurement of differential cross sections for Z bosons produced in association with charm jets in pp collisions at √s = 13 TeV. in Journal of High Energy Physics, 2021(4), 109.
https://doi.org/10.1007/JHEP04(2021)109
Sirunyan AM, Tumasyan A, Adam W, Bergauer T, Dragicevic M, Adžić P, Ćirković P, Đorđević M, Milenović P, Milošević J. Measurement of differential cross sections for Z bosons produced in association with charm jets in pp collisions at √s = 13 TeV. in Journal of High Energy Physics. 2021;2021(4):109.
doi:10.1007/JHEP04(2021)109 .
Sirunyan, A. M., Tumasyan, A., Adam, W., Bergauer, T., Dragicevic, M., Adžić, Petar, Ćirković, Predrag, Đorđević, Miloš, Milenović, Predrag, Milošević, Jovan, "Measurement of differential cross sections for Z bosons produced in association with charm jets in pp collisions at √s = 13 TeV" in Journal of High Energy Physics, 2021, no. 4 (2021):109,
https://doi.org/10.1007/JHEP04(2021)109 . .
 2

#### Development and validation of HERWIG 7 tunes from CMS underlying-event measurements

(2021)

TY  - JOUR
AU  - Sirunyan, A. M.
AU  - Tumasyan, A.
AU  - Adam, W.
AU  - Ambrogi, F.
AU  - Bergauer, T.
AU  - Adžić, Petar
AU  - Ćirković, Predrag
AU  - Đorđević, Miloš
AU  - Milenović, Predrag
AU  - Milošević, Jovan
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9649
AB  - This paper presents new sets of parameters (“tunes”) for the underlying-event model of the  $${\textsc {herwig}} \,7$$     H E R W I G   7     event generator. These parameters control the description of multiple-parton interactions (MPI) and colour reconnection in  $${\textsc {herwig}} \,7$$     H E R W I G   7    , and are obtained from a fit to minimum-bias data collected by the CMS experiment at  $$\sqrt{s}=0.9$$     s  = 0.9    , 7, and  $$13 \,\text {Te}\text {V}$$    13   Te      . The tunes are based on the NNPDF 3.1 next-to-next-to-leading-order parton distribution function (PDF) set for the parton shower, and either a leading-order or next-to-next-to-leading-order PDF set for the simulation of MPI and the beam remnants. Predictions utilizing the tunes are produced for event shape observables in electron-positron collisions, and for minimum-bias, inclusive jet, top quark pair, and Z and W boson events in proton-proton collisions, and are compared with data. Each of the new tunes describes the data at a reasonable level, and the tunes using a leading-order PDF for the simulation of MPI provide the best description of the data.
T2  - European Physical Journal C
T1  - Development and validation of HERWIG 7 tunes from CMS underlying-event measurements
VL  - 81
IS  - 4
SP  - 312
DO  - 10.1140/epjc/s10052-021-08949-5
ER  - 
@article{
author = "Sirunyan, A. M. and Tumasyan, A. and Adam, W. and Ambrogi, F. and Bergauer, T. and Adžić, Petar and Ćirković, Predrag and Đorđević, Miloš and Milenović, Predrag and Milošević, Jovan",
year = "2021",
abstract = "This paper presents new sets of parameters (“tunes”) for the underlying-event model of the  $${\textsc {herwig}} \,7$$     H E R W I G   7     event generator. These parameters control the description of multiple-parton interactions (MPI) and colour reconnection in  $${\textsc {herwig}} \,7$$     H E R W I G   7    , and are obtained from a fit to minimum-bias data collected by the CMS experiment at  $$\sqrt{s}=0.9$$     s  = 0.9    , 7, and  $$13 \,\text {Te}\text {V}$$    13   Te      . The tunes are based on the NNPDF 3.1 next-to-next-to-leading-order parton distribution function (PDF) set for the parton shower, and either a leading-order or next-to-next-to-leading-order PDF set for the simulation of MPI and the beam remnants. Predictions utilizing the tunes are produced for event shape observables in electron-positron collisions, and for minimum-bias, inclusive jet, top quark pair, and Z and W boson events in proton-proton collisions, and are compared with data. Each of the new tunes describes the data at a reasonable level, and the tunes using a leading-order PDF for the simulation of MPI provide the best description of the data.",
journal = "European Physical Journal C",
title = "Development and validation of HERWIG 7 tunes from CMS underlying-event measurements",
volume = "81",
number = "4",
pages = "312",
doi = "10.1140/epjc/s10052-021-08949-5"
}
Sirunyan, A. M., Tumasyan, A., Adam, W., Ambrogi, F., Bergauer, T., Adžić, P., Ćirković, P., Đorđević, M., Milenović, P.,& Milošević, J.. (2021). Development and validation of HERWIG 7 tunes from CMS underlying-event measurements. in European Physical Journal C, 81(4), 312.
https://doi.org/10.1140/epjc/s10052-021-08949-5
Sirunyan AM, Tumasyan A, Adam W, Ambrogi F, Bergauer T, Adžić P, Ćirković P, Đorđević M, Milenović P, Milošević J. Development and validation of HERWIG 7 tunes from CMS underlying-event measurements. in European Physical Journal C. 2021;81(4):312.
doi:10.1140/epjc/s10052-021-08949-5 .
Sirunyan, A. M., Tumasyan, A., Adam, W., Ambrogi, F., Bergauer, T., Adžić, Petar, Ćirković, Predrag, Đorđević, Miloš, Milenović, Predrag, Milošević, Jovan, "Development and validation of HERWIG 7 tunes from CMS underlying-event measurements" in European Physical Journal C, 81, no. 4 (2021):312,
https://doi.org/10.1140/epjc/s10052-021-08949-5 . .
 1 1

#### Measurement of differential tt¯ production cross sections using top quarks at large transverse momenta in pp collisions at s=13TeV

(2021)

TY  - JOUR
AU  - Sirunyan, A. M.
AU  - Tumasyan, A.
AU  - Adam, W.
AU  - Ambrogi, F.
AU  - Bergauer, T.
AU  - Adžić, Petar
AU  - Ćirković, Predrag
AU  - Đorđević, Miloš
AU  - Milenović, Predrag
AU  - Milošević, Jovan
AU  - Stojanović, Milan
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9622
AB  - A measurement is reported of differential top quark pair (tt¯) production cross sections, where top quarks are produced at large transverse momenta. The data collected with the CMS detector at the LHC are from pp collisions at a center-of-mass energy of 13  TeV corresponding to an integrated luminosity of 35.9  fb−1. The measurement uses events where at least one top quark decays as t→Wb→qq¯′b and is reconstructed as a large-radius jet with transverse momentum in excess of 400 GeV. The second top quark is required to decay either in a similar way or leptonically, as inferred from a reconstructed electron or muon, a bottom quark jet, and missing transverse momentum due to the undetected neutrino. The cross section is extracted as a function of kinematic variables of individual top quarks or of the tt¯ system. The results are presented at the particle level, within a region of phase space close to that of the experimental acceptance, and at the parton level and are compared to various theoretical models. In both decay channels, the observed absolute cross sections are significantly lower than the predictions from theory, while the normalized differential measurements are well described.
T2  - Physical Review D
T1  - Measurement of differential tt¯ production cross sections using top quarks at large transverse momenta in pp collisions at s=13TeV
VL  - 103
SP  - 052008
DO  - 10.1103/PhysRevD.103.052008
ER  - 
@article{
author = "Sirunyan, A. M. and Tumasyan, A. and Adam, W. and Ambrogi, F. and Bergauer, T. and Adžić, Petar and Ćirković, Predrag and Đorđević, Miloš and Milenović, Predrag and Milošević, Jovan and Stojanović, Milan",
year = "2021",
abstract = "A measurement is reported of differential top quark pair (tt¯) production cross sections, where top quarks are produced at large transverse momenta. The data collected with the CMS detector at the LHC are from pp collisions at a center-of-mass energy of 13  TeV corresponding to an integrated luminosity of 35.9  fb−1. The measurement uses events where at least one top quark decays as t→Wb→qq¯′b and is reconstructed as a large-radius jet with transverse momentum in excess of 400 GeV. The second top quark is required to decay either in a similar way or leptonically, as inferred from a reconstructed electron or muon, a bottom quark jet, and missing transverse momentum due to the undetected neutrino. The cross section is extracted as a function of kinematic variables of individual top quarks or of the tt¯ system. The results are presented at the particle level, within a region of phase space close to that of the experimental acceptance, and at the parton level and are compared to various theoretical models. In both decay channels, the observed absolute cross sections are significantly lower than the predictions from theory, while the normalized differential measurements are well described.",
journal = "Physical Review D",
title = "Measurement of differential tt¯ production cross sections using top quarks at large transverse momenta in pp collisions at s=13TeV",
volume = "103",
pages = "052008",
doi = "10.1103/PhysRevD.103.052008"
}
Sirunyan, A. M., Tumasyan, A., Adam, W., Ambrogi, F., Bergauer, T., Adžić, P., Ćirković, P., Đorđević, M., Milenović, P., Milošević, J.,& Stojanović, M.. (2021). Measurement of differential tt¯ production cross sections using top quarks at large transverse momenta in pp collisions at s=13TeV. in Physical Review D, 103, 052008.
https://doi.org/10.1103/PhysRevD.103.052008
Sirunyan AM, Tumasyan A, Adam W, Ambrogi F, Bergauer T, Adžić P, Ćirković P, Đorđević M, Milenović P, Milošević J, Stojanović M. Measurement of differential tt¯ production cross sections using top quarks at large transverse momenta in pp collisions at s=13TeV. in Physical Review D. 2021;103:052008.
doi:10.1103/PhysRevD.103.052008 .
Sirunyan, A. M., Tumasyan, A., Adam, W., Ambrogi, F., Bergauer, T., Adžić, Petar, Ćirković, Predrag, Đorđević, Miloš, Milenović, Predrag, Milošević, Jovan, Stojanović, Milan, "Measurement of differential tt¯ production cross sections using top quarks at large transverse momenta in pp collisions at s=13TeV" in Physical Review D, 103 (2021):052008,
https://doi.org/10.1103/PhysRevD.103.052008 . .
 6 1 1

#### Evidence for Higgs boson decay to a pair of muons

(2021)

TY  - JOUR
AU  - Sirunyan, A. M.
AU  - Tumasyan, A.
AU  - Adam, W.
AU  - Bergauer, T.
AU  - Dragicevic, M.
AU  - Adžić, Petar
AU  - Ćirković, Predrag
AU  - Đorđević, Miloš
AU  - Milenović, Predrag
AU  - Milošević, Jovan
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9551
AB  - Evidence for Higgs boson decay to a pair of muons is presented. This result combines searches in four exclusive categories targeting the production of the Higgs boson via gluon fusion, via vector boson fusion, in association with a vector boson, and in association with a top quark-antiquark pair. The analysis is performed using proton-proton collision data at     s    $$\sqrt{s}$$  = 13 TeV, corresponding to an integrated luminosity of 137 fb −1, recorded by the CMS experiment at the CERN LHC. An excess of events over the back- ground expectation is observed in data with a significance of 3.0 standard deviations, where the expectation for the standard model (SM) Higgs boson with mass of 125.38 GeV is 2.5. The combination of this result with that from data recorded at     s    $$\sqrt{s}$$  = 7 and 8 TeV, corresponding to integrated luminosities of 5.1 and 19.7 fb −1, respectively, increases both the expected and observed significances by 1%. The measured signal strength, relative to the SM prediction, is     1.19  − 0.39   + 0.40     stat   − 0.14   + 0.15    syst    $${1.19}_{-0.39}^{+0.40}{\left(\mathrm{stat}\right)}_{-0.14}^{+0.15}\left(\mathrm{syst}\right)$$ . This result constitutes the first evidence for the decay of the Higgs boson to second generation fermions and is the most precise measurement of the Higgs boson coupling to muons reported to date.
T2  - Journal of High Energy Physics
T1  - Evidence for Higgs boson decay to a pair of muons
VL  - 2021
IS  - 1
SP  - 148
DO  - 10.1007/JHEP01(2021)148
ER  - 
@article{
author = "Sirunyan, A. M. and Tumasyan, A. and Adam, W. and Bergauer, T. and Dragicevic, M. and Adžić, Petar and Ćirković, Predrag and Đorđević, Miloš and Milenović, Predrag and Milošević, Jovan",
year = "2021",
abstract = "Evidence for Higgs boson decay to a pair of muons is presented. This result combines searches in four exclusive categories targeting the production of the Higgs boson via gluon fusion, via vector boson fusion, in association with a vector boson, and in association with a top quark-antiquark pair. The analysis is performed using proton-proton collision data at     s    $$\sqrt{s}$$  = 13 TeV, corresponding to an integrated luminosity of 137 fb −1, recorded by the CMS experiment at the CERN LHC. An excess of events over the back- ground expectation is observed in data with a significance of 3.0 standard deviations, where the expectation for the standard model (SM) Higgs boson with mass of 125.38 GeV is 2.5. The combination of this result with that from data recorded at     s    $$\sqrt{s}$$  = 7 and 8 TeV, corresponding to integrated luminosities of 5.1 and 19.7 fb −1, respectively, increases both the expected and observed significances by 1%. The measured signal strength, relative to the SM prediction, is     1.19  − 0.39   + 0.40     stat   − 0.14   + 0.15    syst    $${1.19}_{-0.39}^{+0.40}{\left(\mathrm{stat}\right)}_{-0.14}^{+0.15}\left(\mathrm{syst}\right)$$ . This result constitutes the first evidence for the decay of the Higgs boson to second generation fermions and is the most precise measurement of the Higgs boson coupling to muons reported to date.",
journal = "Journal of High Energy Physics",
title = "Evidence for Higgs boson decay to a pair of muons",
volume = "2021",
number = "1",
pages = "148",
doi = "10.1007/JHEP01(2021)148"
}
Sirunyan, A. M., Tumasyan, A., Adam, W., Bergauer, T., Dragicevic, M., Adžić, P., Ćirković, P., Đorđević, M., Milenović, P.,& Milošević, J.. (2021). Evidence for Higgs boson decay to a pair of muons. in Journal of High Energy Physics, 2021(1), 148.
https://doi.org/10.1007/JHEP01(2021)148
Sirunyan AM, Tumasyan A, Adam W, Bergauer T, Dragicevic M, Adžić P, Ćirković P, Đorđević M, Milenović P, Milošević J. Evidence for Higgs boson decay to a pair of muons. in Journal of High Energy Physics. 2021;2021(1):148.
doi:10.1007/JHEP01(2021)148 .
Sirunyan, A. M., Tumasyan, A., Adam, W., Bergauer, T., Dragicevic, M., Adžić, Petar, Ćirković, Predrag, Đorđević, Miloš, Milenović, Predrag, Milošević, Jovan, "Evidence for Higgs boson decay to a pair of muons" in Journal of High Energy Physics, 2021, no. 1 (2021):148,
https://doi.org/10.1007/JHEP01(2021)148 . .
 13 11 20

#### Measurement of the inclusive and differential Higgs boson production cross sections in the leptonic WW decay mode at √s = 13 TeV

(2021)

TY  - JOUR
AU  - Sirunyan, A. M.
AU  - Tumasyan, A
AU  - Adam, W.
AU  - Ambrogi, F.
AU  - Adžić, Petar
AU  - Ćirković, Predrag
AU  - Đorđević, Miloš
AU  - Milenović, Predrag
AU  - Milošević, Jovan
AU  - Stojanović, Milan
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9404
AB  - Measurements of the fiducial inclusive and differential production cross sections of the Higgs boson in proton-proton collisions at s = 13 TeV are performed using events where the Higgs boson decays into a pair of W bosons that subsequently decay into a final state with an electron, a muon, and a pair of neutrinos. The analysis is based on data collected with the CMS detector at the LHC during 2016–2018, corresponding to an integrated luminosity of 137 fb−1. Production cross sections are measured as a function of the transverse momentum of the Higgs boson and the associated jet multiplicity. The Higgs boson signal is extracted and simultaneously unfolded to correct for selection efficiency and resolution effects using maximum-likelihood fits to the observed distributions in data. The integrated fiducial cross section is measured to be 86.5 ± 9.5 fb, consistent with the Standard Model expectation of 82.5 ± 4.2 fb. No significant deviation from the Standard Model expectations is observed in the differential measurements. [Figure not available: see fulltext.] © 2021, The Author(s).
T2  - Journal of High Energy Physics
T1  - Measurement of the inclusive and differential Higgs boson production cross sections in the leptonic WW decay mode at √s = 13 TeV
VL  - 2021
IS  - 3
DO  - 10.1007/JHEP03(2021)003
ER  - 
@article{
author = "Sirunyan, A. M. and Tumasyan, A and Adam, W. and Ambrogi, F. and Adžić, Petar and Ćirković, Predrag and Đorđević, Miloš and Milenović, Predrag and Milošević, Jovan and Stojanović, Milan",
year = "2021",
abstract = "Measurements of the fiducial inclusive and differential production cross sections of the Higgs boson in proton-proton collisions at s = 13 TeV are performed using events where the Higgs boson decays into a pair of W bosons that subsequently decay into a final state with an electron, a muon, and a pair of neutrinos. The analysis is based on data collected with the CMS detector at the LHC during 2016–2018, corresponding to an integrated luminosity of 137 fb−1. Production cross sections are measured as a function of the transverse momentum of the Higgs boson and the associated jet multiplicity. The Higgs boson signal is extracted and simultaneously unfolded to correct for selection efficiency and resolution effects using maximum-likelihood fits to the observed distributions in data. The integrated fiducial cross section is measured to be 86.5 ± 9.5 fb, consistent with the Standard Model expectation of 82.5 ± 4.2 fb. No significant deviation from the Standard Model expectations is observed in the differential measurements. [Figure not available: see fulltext.] © 2021, The Author(s).",
journal = "Journal of High Energy Physics",
title = "Measurement of the inclusive and differential Higgs boson production cross sections in the leptonic WW decay mode at √s = 13 TeV",
volume = "2021",
number = "3",
doi = "10.1007/JHEP03(2021)003"
}
Sirunyan, A. M., Tumasyan, A., Adam, W., Ambrogi, F., Adžić, P., Ćirković, P., Đorđević, M., Milenović, P., Milošević, J.,& Stojanović, M.. (2021). Measurement of the inclusive and differential Higgs boson production cross sections in the leptonic WW decay mode at √s = 13 TeV. in Journal of High Energy Physics, 2021(3).
https://doi.org/10.1007/JHEP03(2021)003
Sirunyan AM, Tumasyan A, Adam W, Ambrogi F, Adžić P, Ćirković P, Đorđević M, Milenović P, Milošević J, Stojanović M. Measurement of the inclusive and differential Higgs boson production cross sections in the leptonic WW decay mode at √s = 13 TeV. in Journal of High Energy Physics. 2021;2021(3).
doi:10.1007/JHEP03(2021)003 .
Sirunyan, A. M., Tumasyan, A, Adam, W., Ambrogi, F., Adžić, Petar, Ćirković, Predrag, Đorđević, Miloš, Milenović, Predrag, Milošević, Jovan, Stojanović, Milan, "Measurement of the inclusive and differential Higgs boson production cross sections in the leptonic WW decay mode at √s = 13 TeV" in Journal of High Energy Physics, 2021, no. 3 (2021),
https://doi.org/10.1007/JHEP03(2021)003 . .
 3 1 6

#### Search for the lepton flavor violating decay τ → 3μ in proton-proton collisions at √s = 13 TeV

(2021)

TY  - JOUR
AU  - Sirunyan, A. M.
AU  - Tumasyan, A.
AU  - Adam, W.
AU  - Ambrogi, F.
AU  - Bergauer, T.
AU  - Adžić, Petar
AU  - Ćirković, Predrag
AU  - Đorđević, Miloš
AU  - Milenović, Predrag
AU  - Milošević, Jovan
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9550
AB  - Results are reported from a search for the lepton flavor violating decay τ → 3μ in proton-proton collisions at     s    $$\sqrt{\mathrm{s}}$$  = 13 TeV. The data sample corresponds to an integrated luminosity of 33.2 fb −1 recorded by the CMS experiment at the LHC in 2016. The search exploits τ leptons produced in both W boson and heavy-flavor hadron decays. No significant excess above the expected background is observed. An upper limit on the branching fraction ℬ(τ → 3μ) of 8.0 × 10 −8 at 90% confidence level is obtained, with an expected upper limit of 6.9 × 10 −8.
T2  - Journal of High Energy Physics
T1  - Search for the lepton flavor violating decay τ → 3μ in proton-proton collisions at √s = 13 TeV
VL  - 2021
IS  - 1
SP  - 163
DO  - 10.1007/JHEP01(2021)163
ER  - 
@article{
author = "Sirunyan, A. M. and Tumasyan, A. and Adam, W. and Ambrogi, F. and Bergauer, T. and Adžić, Petar and Ćirković, Predrag and Đorđević, Miloš and Milenović, Predrag and Milošević, Jovan",
year = "2021",
abstract = "Results are reported from a search for the lepton flavor violating decay τ → 3μ in proton-proton collisions at     s    $$\sqrt{\mathrm{s}}$$  = 13 TeV. The data sample corresponds to an integrated luminosity of 33.2 fb −1 recorded by the CMS experiment at the LHC in 2016. The search exploits τ leptons produced in both W boson and heavy-flavor hadron decays. No significant excess above the expected background is observed. An upper limit on the branching fraction ℬ(τ → 3μ) of 8.0 × 10 −8 at 90% confidence level is obtained, with an expected upper limit of 6.9 × 10 −8.",
journal = "Journal of High Energy Physics",
title = "Search for the lepton flavor violating decay τ → 3μ in proton-proton collisions at √s = 13 TeV",
volume = "2021",
number = "1",
pages = "163",
doi = "10.1007/JHEP01(2021)163"
}
Sirunyan, A. M., Tumasyan, A., Adam, W., Ambrogi, F., Bergauer, T., Adžić, P., Ćirković, P., Đorđević, M., Milenović, P.,& Milošević, J.. (2021). Search for the lepton flavor violating decay τ → 3μ in proton-proton collisions at √s = 13 TeV. in Journal of High Energy Physics, 2021(1), 163.
https://doi.org/10.1007/JHEP01(2021)163
Sirunyan AM, Tumasyan A, Adam W, Ambrogi F, Bergauer T, Adžić P, Ćirković P, Đorđević M, Milenović P, Milošević J. Search for the lepton flavor violating decay τ → 3μ in proton-proton collisions at √s = 13 TeV. in Journal of High Energy Physics. 2021;2021(1):163.
doi:10.1007/JHEP01(2021)163 .
Sirunyan, A. M., Tumasyan, A., Adam, W., Ambrogi, F., Bergauer, T., Adžić, Petar, Ćirković, Predrag, Đorđević, Miloš, Milenović, Predrag, Milošević, Jovan, "Search for the lepton flavor violating decay τ → 3μ in proton-proton collisions at √s = 13 TeV" in Journal of High Energy Physics, 2021, no. 1 (2021):163,
https://doi.org/10.1007/JHEP01(2021)163 . .
 1 2 1

#### Search for dark matter produced in association with a leptonically decaying Z boson in proton–proton collisions at √s=13Te

(2021)

TY  - JOUR
AU  - Sirunyan, A. M.
AU  - Tumasyan, A.
AU  - Adam, W.
AU  - Bergauer, T.
AU  - Dragicevic, M.
AU  - Adžić, Petar
AU  - Ćirković, Predrag
AU  - Đorđević, Miloš
AU  - Milenović, Predrag
AU  - Milošević, Jovan
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9513
AB  - A search for dark matter particles is performed using events with a Z boson candidate and large missing transverse momentum. The analysis is based on proton–proton collision data at a center-of-mass energy of 13Te, collected by the CMS experiment at the LHC in 2016–2018, corresponding to an integrated luminosity of 137fb-1. The search uses the decay channels Z → e e and Z → μ μ. No significant excess of events is observed over the background expected from the standard model. Limits are set on dark matter particle production in the context of simplified models with vector, axial-vector, scalar, and pseudoscalar mediators, as well as on a two-Higgs-doublet model with an additional pseudoscalar mediator. In addition, limits are provided for spin-dependent and spin-independent scattering cross sections and are compared to those from direct-detection experiments. The results are also interpreted in the context of models of invisible Higgs boson decays, unparticles, and large extra dimensions.
T2  - European Physical Journal C
T1  - Search for dark matter produced in association with a leptonically decaying Z boson in proton–proton collisions at √s=13Te
VL  - 81
IS  - 1
SP  - 13
DO  - 10.1140/epjc/s10052-020-08739-5
ER  - 
@article{
author = "Sirunyan, A. M. and Tumasyan, A. and Adam, W. and Bergauer, T. and Dragicevic, M. and Adžić, Petar and Ćirković, Predrag and Đorđević, Miloš and Milenović, Predrag and Milošević, Jovan",
year = "2021",
abstract = "A search for dark matter particles is performed using events with a Z boson candidate and large missing transverse momentum. The analysis is based on proton–proton collision data at a center-of-mass energy of 13Te, collected by the CMS experiment at the LHC in 2016–2018, corresponding to an integrated luminosity of 137fb-1. The search uses the decay channels Z → e e and Z → μ μ. No significant excess of events is observed over the background expected from the standard model. Limits are set on dark matter particle production in the context of simplified models with vector, axial-vector, scalar, and pseudoscalar mediators, as well as on a two-Higgs-doublet model with an additional pseudoscalar mediator. In addition, limits are provided for spin-dependent and spin-independent scattering cross sections and are compared to those from direct-detection experiments. The results are also interpreted in the context of models of invisible Higgs boson decays, unparticles, and large extra dimensions.",
journal = "European Physical Journal C",
title = "Search for dark matter produced in association with a leptonically decaying Z boson in proton–proton collisions at √s=13Te",
volume = "81",
number = "1",
pages = "13",
doi = "10.1140/epjc/s10052-020-08739-5"
}
Sirunyan, A. M., Tumasyan, A., Adam, W., Bergauer, T., Dragicevic, M., Adžić, P., Ćirković, P., Đorđević, M., Milenović, P.,& Milošević, J.. (2021). Search for dark matter produced in association with a leptonically decaying Z boson in proton–proton collisions at √s=13Te. in European Physical Journal C, 81(1), 13.
https://doi.org/10.1140/epjc/s10052-020-08739-5
Sirunyan AM, Tumasyan A, Adam W, Bergauer T, Dragicevic M, Adžić P, Ćirković P, Đorđević M, Milenović P, Milošević J. Search for dark matter produced in association with a leptonically decaying Z boson in proton–proton collisions at √s=13Te. in European Physical Journal C. 2021;81(1):13.
doi:10.1140/epjc/s10052-020-08739-5 .
Sirunyan, A. M., Tumasyan, A., Adam, W., Bergauer, T., Dragicevic, M., Adžić, Petar, Ćirković, Predrag, Đorđević, Miloš, Milenović, Predrag, Milošević, Jovan, "Search for dark matter produced in association with a leptonically decaying Z boson in proton–proton collisions at √s=13Te" in European Physical Journal C, 81, no. 1 (2021):13,
https://doi.org/10.1140/epjc/s10052-020-08739-5 . .
 4 4 1 3

#### Search for dark photons in Higgs boson production via vector boson fusion in proton-proton collisions at √s = 13 TeV

(2021)

TY  - JOUR
AU  - Sirunyan, A. M.
AU  - Tumasyan, A.
AU  - Adam, W.
AU  - Bergauer, T.
AU  - Dragicevic, M.
AU  - Adžić, Petar
AU  - Ćirković, Predrag
AU  - Đorđević, Miloš
AU  - Milenović, Predrag
AU  - Milošević, Jovan
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9147
AB  - A search is presented for a Higgs boson that is produced via vector boson fusion and that decays to an undetected particle and an isolated photon. The search is performed by the CMS collaboration at the LHC, using a data set corresponding to an integrated luminosity of 130 fb −1, recorded at a center-of-mass energy of 13 TeV in 2016–2018. No significant excess of events above the expectation from the standard model background is found. The results are interpreted in the context of a theoretical model in which the undetected particle is a massless dark photon. An upper limit is set on the product of the cross section for production via vector boson fusion and the branching fraction for such a Higgs boson decay, as a function of the Higgs boson mass. For a Higgs boson mass of 125 GeV, assuming the standard model production rates, the observed (expected) 95% confidence level upper limit on the branching fraction is 3.5 (2.8)%. This is the first search for such decays in the vector boson fusion channel. Combination with a previous search for Higgs bosons produced in association with a Z boson results in an observed (expected) upper limit on the branching fraction of 2.9 (2.1)% at 95% confidence level.
T2  - Journal of High Energy Physics
T1  - Search for dark photons in Higgs boson production via vector boson fusion in proton-proton collisions at √s = 13 TeV
VL  - 2021
IS  - 3
SP  - 11
DO  - 10.1007/JHEP03(2021)011
ER  - 
@article{
author = "Sirunyan, A. M. and Tumasyan, A. and Adam, W. and Bergauer, T. and Dragicevic, M. and Adžić, Petar and Ćirković, Predrag and Đorđević, Miloš and Milenović, Predrag and Milošević, Jovan",
year = "2021",
abstract = "A search is presented for a Higgs boson that is produced via vector boson fusion and that decays to an undetected particle and an isolated photon. The search is performed by the CMS collaboration at the LHC, using a data set corresponding to an integrated luminosity of 130 fb −1, recorded at a center-of-mass energy of 13 TeV in 2016–2018. No significant excess of events above the expectation from the standard model background is found. The results are interpreted in the context of a theoretical model in which the undetected particle is a massless dark photon. An upper limit is set on the product of the cross section for production via vector boson fusion and the branching fraction for such a Higgs boson decay, as a function of the Higgs boson mass. For a Higgs boson mass of 125 GeV, assuming the standard model production rates, the observed (expected) 95% confidence level upper limit on the branching fraction is 3.5 (2.8)%. This is the first search for such decays in the vector boson fusion channel. Combination with a previous search for Higgs bosons produced in association with a Z boson results in an observed (expected) upper limit on the branching fraction of 2.9 (2.1)% at 95% confidence level.",
journal = "Journal of High Energy Physics",
title = "Search for dark photons in Higgs boson production via vector boson fusion in proton-proton collisions at √s = 13 TeV",
volume = "2021",
number = "3",
pages = "11",
doi = "10.1007/JHEP03(2021)011"
}
Sirunyan, A. M., Tumasyan, A., Adam, W., Bergauer, T., Dragicevic, M., Adžić, P., Ćirković, P., Đorđević, M., Milenović, P.,& Milošević, J.. (2021). Search for dark photons in Higgs boson production via vector boson fusion in proton-proton collisions at √s = 13 TeV. in Journal of High Energy Physics, 2021(3), 11.
https://doi.org/10.1007/JHEP03(2021)011
Sirunyan AM, Tumasyan A, Adam W, Bergauer T, Dragicevic M, Adžić P, Ćirković P, Đorđević M, Milenović P, Milošević J. Search for dark photons in Higgs boson production via vector boson fusion in proton-proton collisions at √s = 13 TeV. in Journal of High Energy Physics. 2021;2021(3):11.
doi:10.1007/JHEP03(2021)011 .
Sirunyan, A. M., Tumasyan, A., Adam, W., Bergauer, T., Dragicevic, M., Adžić, Petar, Ćirković, Predrag, Đorđević, Miloš, Milenović, Predrag, Milošević, Jovan, "Search for dark photons in Higgs boson production via vector boson fusion in proton-proton collisions at √s = 13 TeV" in Journal of High Energy Physics, 2021, no. 3 (2021):11,
https://doi.org/10.1007/JHEP03(2021)011 . .
 1 1

#### Search for top squark pair production using dilepton final states in pp collision data collected at √s=13TeV

(2021)

TY  - JOUR
AU  - Sirunyan, A. M.
AU  - Tumasyan, A.
AU  - Adam, W.
AU  - Ambrogi, F.
AU  - Bergauer, T.
AU  - Adžić, Petar
AU  - Ćirković, Predrag
AU  - Đorđević, Miloš
AU  - Milenović, Predrag
AU  - Milošević, Jovan
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8917
AB  - A search is presented for supersymmetric partners of the top quark (top squarks) in final states with two oppositely charged leptons (electrons or muons), jets identified as originating from b quarks, and missing transverse momentum. The search uses data from proton-proton collisions at s=13TeV collected with the CMS detector, corresponding to an integrated luminosity of 137fb-1. Hypothetical signal events are efficiently separated from the dominant top quark pair production background with requirements on the significance of the missing transverse momentum and on transverse mass variables. No significant deviation is observed from the expected background. Exclusion limits are set in the context of simplified supersymmetric models with pair-produced lightest top squarks. For top squarks decaying exclusively to a top quark and a lightest neutralino, lower limits are placed at 95 % confidence level on the masses of the top squark and the neutralino up to 925 and 450GeV, respectively. If the decay proceeds via an intermediate chargino, the corresponding lower limits on the mass of the lightest top squark are set up to 850GeV for neutralino masses below 420GeV. For top squarks undergoing a cascade decay through charginos and sleptons, the mass limits reach up to 1.4TeV and 900GeV respectively for the top squark and the lightest neutralino.
T2  - European Physical Journal C
T1  - Search for top squark pair production using dilepton final states in pp collision data collected at √s=13TeV
VL  - 81
IS  - 1
SP  - 3
DO  - 10.1140/epjc/s10052-020-08701-5
ER  - 
@article{
author = "Sirunyan, A. M. and Tumasyan, A. and Adam, W. and Ambrogi, F. and Bergauer, T. and Adžić, Petar and Ćirković, Predrag and Đorđević, Miloš and Milenović, Predrag and Milošević, Jovan",
year = "2021",
abstract = "A search is presented for supersymmetric partners of the top quark (top squarks) in final states with two oppositely charged leptons (electrons or muons), jets identified as originating from b quarks, and missing transverse momentum. The search uses data from proton-proton collisions at s=13TeV collected with the CMS detector, corresponding to an integrated luminosity of 137fb-1. Hypothetical signal events are efficiently separated from the dominant top quark pair production background with requirements on the significance of the missing transverse momentum and on transverse mass variables. No significant deviation is observed from the expected background. Exclusion limits are set in the context of simplified supersymmetric models with pair-produced lightest top squarks. For top squarks decaying exclusively to a top quark and a lightest neutralino, lower limits are placed at 95 % confidence level on the masses of the top squark and the neutralino up to 925 and 450GeV, respectively. If the decay proceeds via an intermediate chargino, the corresponding lower limits on the mass of the lightest top squark are set up to 850GeV for neutralino masses below 420GeV. For top squarks undergoing a cascade decay through charginos and sleptons, the mass limits reach up to 1.4TeV and 900GeV respectively for the top squark and the lightest neutralino.",
journal = "European Physical Journal C",
title = "Search for top squark pair production using dilepton final states in pp collision data collected at √s=13TeV",
volume = "81",
number = "1",
pages = "3",
doi = "10.1140/epjc/s10052-020-08701-5"
}
Sirunyan, A. M., Tumasyan, A., Adam, W., Ambrogi, F., Bergauer, T., Adžić, P., Ćirković, P., Đorđević, M., Milenović, P.,& Milošević, J.. (2021). Search for top squark pair production using dilepton final states in pp collision data collected at √s=13TeV. in European Physical Journal C, 81(1), 3.
https://doi.org/10.1140/epjc/s10052-020-08701-5
Sirunyan AM, Tumasyan A, Adam W, Ambrogi F, Bergauer T, Adžić P, Ćirković P, Đorđević M, Milenović P, Milošević J. Search for top squark pair production using dilepton final states in pp collision data collected at √s=13TeV. in European Physical Journal C. 2021;81(1):3.
doi:10.1140/epjc/s10052-020-08701-5 .
Sirunyan, A. M., Tumasyan, A., Adam, W., Ambrogi, F., Bergauer, T., Adžić, Petar, Ćirković, Predrag, Đorđević, Miloš, Milenović, Predrag, Milošević, Jovan, "Search for top squark pair production using dilepton final states in pp collision data collected at √s=13TeV" in European Physical Journal C, 81, no. 1 (2021):3,
https://doi.org/10.1140/epjc/s10052-020-08701-5 . .
 1 3 3 5

#### Measurement of the CP-violating phase ϕs in the Bs 0→J/ψϕ(1020)→μ+μ−K+K− channel in proton-proton collisions at s=13TeV

(2021)

TY  - JOUR
AU  - Sirunyan, A. M.
AU  - Tumasyan, A.
AU  - Adam, W.
AU  - Ambrogi, F.
AU  - Bergauer, T.
AU  - Adžić, Petar
AU  - Ćirković, Predrag
AU  - Đorđević, Miloš
AU  - Milenović, Predrag
AU  - Milošević, Jovan
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9167
AB  - The CP -violating weak phase ϕs and the decay width difference ΔΓs between the light and heavy Bs0 mass eigenstates are measured with the CMS detector at the LHC in a sample of 48500reconstructed Bs0→J/ψϕ(1020)→μ+μ−K+K− events. The measurement is based on a data sample corresponding to an integrated luminosity of 96.4fb−1, collected in proton-proton collisions at s=13TeV in 2017–2018. To extract the values of ϕs and ΔΓs, a time-dependent and flavor-tagged angular analysis of the μ+μ−K+K− final state is performed. The analysis employs a dedicated tagging trigger and a novel opposite-side muon flavor tagger based on machine learning techniques. The measurement yields ϕs=−11±50(stat)±10(syst)mrad and ΔΓs=0.114±0.014(stat)±0.007(syst)ps−1, in agreement with the standard model predictions. When combined with the previous CMS measurement at s=8TeV, the following values are obtained: ϕs=−21±44(stat)±10(syst)mrad, ΔΓs=0.1032±0.0095(stat)±0.0048(syst)ps−1, a significant improvement over the 8 TeV result.
T2  - Physics Letters B
T1  - Measurement of the CP-violating phase ϕs in the Bs 0→J/ψϕ(1020)→μ+μ−K+K− channel in proton-proton collisions at s=13TeV
VL  - 816 C
SP  - 136188
DO  - 10.1016/j.physletb.2021.136188
ER  - 
@article{
author = "Sirunyan, A. M. and Tumasyan, A. and Adam, W. and Ambrogi, F. and Bergauer, T. and Adžić, Petar and Ćirković, Predrag and Đorđević, Miloš and Milenović, Predrag and Milošević, Jovan",
year = "2021",
abstract = "The CP -violating weak phase ϕs and the decay width difference ΔΓs between the light and heavy Bs0 mass eigenstates are measured with the CMS detector at the LHC in a sample of 48500reconstructed Bs0→J/ψϕ(1020)→μ+μ−K+K− events. The measurement is based on a data sample corresponding to an integrated luminosity of 96.4fb−1, collected in proton-proton collisions at s=13TeV in 2017–2018. To extract the values of ϕs and ΔΓs, a time-dependent and flavor-tagged angular analysis of the μ+μ−K+K− final state is performed. The analysis employs a dedicated tagging trigger and a novel opposite-side muon flavor tagger based on machine learning techniques. The measurement yields ϕs=−11±50(stat)±10(syst)mrad and ΔΓs=0.114±0.014(stat)±0.007(syst)ps−1, in agreement with the standard model predictions. When combined with the previous CMS measurement at s=8TeV, the following values are obtained: ϕs=−21±44(stat)±10(syst)mrad, ΔΓs=0.1032±0.0095(stat)±0.0048(syst)ps−1, a significant improvement over the 8 TeV result.",
journal = "Physics Letters B",
title = "Measurement of the CP-violating phase ϕs in the Bs 0→J/ψϕ(1020)→μ+μ−K+K− channel in proton-proton collisions at s=13TeV",
volume = "816 C",
pages = "136188",
doi = "10.1016/j.physletb.2021.136188"
}
Sirunyan, A. M., Tumasyan, A., Adam, W., Ambrogi, F., Bergauer, T., Adžić, P., Ćirković, P., Đorđević, M., Milenović, P.,& Milošević, J.. (2021). Measurement of the CP-violating phase ϕs in the Bs 0→J/ψϕ(1020)→μ+μ−K+K− channel in proton-proton collisions at s=13TeV. in Physics Letters B, 816 C, 136188.
https://doi.org/10.1016/j.physletb.2021.136188
Sirunyan AM, Tumasyan A, Adam W, Ambrogi F, Bergauer T, Adžić P, Ćirković P, Đorđević M, Milenović P, Milošević J. Measurement of the CP-violating phase ϕs in the Bs 0→J/ψϕ(1020)→μ+μ−K+K− channel in proton-proton collisions at s=13TeV. in Physics Letters B. 2021;816 C:136188.
doi:10.1016/j.physletb.2021.136188 .
Sirunyan, A. M., Tumasyan, A., Adam, W., Ambrogi, F., Bergauer, T., Adžić, Petar, Ćirković, Predrag, Đorđević, Miloš, Milenović, Predrag, Milošević, Jovan, "Measurement of the CP-violating phase ϕs in the Bs 0→J/ψϕ(1020)→μ+μ−K+K− channel in proton-proton collisions at s=13TeV" in Physics Letters B, 816 C (2021):136188,
https://doi.org/10.1016/j.physletb.2021.136188 . .
 1 1 2

#### Correlations of azimuthal anisotropy Fourier harmonics with subevent cumulants in pPb collisions at sNN=8.16TeV

(2021)

TY  - JOUR
AU  - Sirunyan, A. M.
AU  - Tumasyan, A.
AU  - Adam, W.
AU  - Ambrogi, F.
AU  - Asilar, E.
AU  - Adžić, Petar
AU  - Ćirković, Predrag
AU  - Devetak, Damir
AU  - Đorđević, Miloš
AU  - Milošević, Jovan
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9539
AB  - Event-by-event long-range correlations of azimuthal anisotropy Fourier coefficients (vn) in 8.16 TeV pPb data, collected by the CMS experiment at the CERN Large Hadron Collider, are extracted using a subevent four-particle cumulant technique applied to very low multiplicity events. Each combination of four charged particles is selected from either two, three, or four distinct subevent regions of a pseudorapidity range from −2.4 to 2.4 of the CMS tracker, and with transverse momentum between 0.3 and 3.0 GeV. Using the subevent cumulant technique, correlations between vn of different orders are measured as functions of particle multiplicity and compared to the standard cumulant method without subevents over a wide event multiplicity range. At high multiplicities, the v2 and v3 coefficients exhibit an anticorrelation; this behavior is observed consistently using various methods. The v2 and v4 correlation strength is found to depend on the number of subevents used in the calculation. As the event multiplicity decreases, the results from different subevent methods diverge because of different contributions of noncollective or few-particle correlations. Correlations extracted with the four-subevent method exhibit a tendency to diminish monotonically toward the lowest multiplicity region (about 20 charged tracks) investigated. These findings extend previous studies to a significantly lower event multiplicity range and establish the evidence for the onset of long-range collective multiparticle correlations in small system collisions.
T2  - Physical Review C
T1  - Correlations of azimuthal anisotropy Fourier harmonics with subevent cumulants in pPb collisions at sNN=8.16TeV
VL  - 103
DO  - 10.1103/PhysRevC.103.014902
ER  - 
@article{
author = "Sirunyan, A. M. and Tumasyan, A. and Adam, W. and Ambrogi, F. and Asilar, E. and Adžić, Petar and Ćirković, Predrag and Devetak, Damir and Đorđević, Miloš and Milošević, Jovan",
year = "2021",
abstract = "Event-by-event long-range correlations of azimuthal anisotropy Fourier coefficients (vn) in 8.16 TeV pPb data, collected by the CMS experiment at the CERN Large Hadron Collider, are extracted using a subevent four-particle cumulant technique applied to very low multiplicity events. Each combination of four charged particles is selected from either two, three, or four distinct subevent regions of a pseudorapidity range from −2.4 to 2.4 of the CMS tracker, and with transverse momentum between 0.3 and 3.0 GeV. Using the subevent cumulant technique, correlations between vn of different orders are measured as functions of particle multiplicity and compared to the standard cumulant method without subevents over a wide event multiplicity range. At high multiplicities, the v2 and v3 coefficients exhibit an anticorrelation; this behavior is observed consistently using various methods. The v2 and v4 correlation strength is found to depend on the number of subevents used in the calculation. As the event multiplicity decreases, the results from different subevent methods diverge because of different contributions of noncollective or few-particle correlations. Correlations extracted with the four-subevent method exhibit a tendency to diminish monotonically toward the lowest multiplicity region (about 20 charged tracks) investigated. These findings extend previous studies to a significantly lower event multiplicity range and establish the evidence for the onset of long-range collective multiparticle correlations in small system collisions.",
journal = "Physical Review C",
title = "Correlations of azimuthal anisotropy Fourier harmonics with subevent cumulants in pPb collisions at sNN=8.16TeV",
volume = "103",
doi = "10.1103/PhysRevC.103.014902"
}
Sirunyan, A. M., Tumasyan, A., Adam, W., Ambrogi, F., Asilar, E., Adžić, P., Ćirković, P., Devetak, D., Đorđević, M.,& Milošević, J.. (2021). Correlations of azimuthal anisotropy Fourier harmonics with subevent cumulants in pPb collisions at sNN=8.16TeV. in Physical Review C, 103.
https://doi.org/10.1103/PhysRevC.103.014902
Sirunyan AM, Tumasyan A, Adam W, Ambrogi F, Asilar E, Adžić P, Ćirković P, Devetak D, Đorđević M, Milošević J. Correlations of azimuthal anisotropy Fourier harmonics with subevent cumulants in pPb collisions at sNN=8.16TeV. in Physical Review C. 2021;103.
doi:10.1103/PhysRevC.103.014902 .
Sirunyan, A. M., Tumasyan, A., Adam, W., Ambrogi, F., Asilar, E., Adžić, Petar, Ćirković, Predrag, Devetak, Damir, Đorđević, Miloš, Milošević, Jovan, "Correlations of azimuthal anisotropy Fourier harmonics with subevent cumulants in pPb collisions at sNN=8.16TeV" in Physical Review C, 103 (2021),
https://doi.org/10.1103/PhysRevC.103.014902 . .
 1

#### Studies of charm and beauty hadron long-range correlations in pp and pPb collisions at LHC energies

(2021)

TY  - JOUR
AU  - Sirunyan, A. M.
AU  - Tumasyan, A.
AU  - Adam, W.
AU  - Ambrogi, F.
AU  - Bergauer, T.
AU  - Adžić, Petar
AU  - Ćirković, Predrag
AU  - Đorđević, Miloš
AU  - Milenović, Predrag
AU  - Milošević, Jovan
AU  - Stojanović, Milan
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9573
AB  - Measurements of the second Fourier harmonic coefficient (v2) of the azimuthal distributions of prompt and nonprompt D$^{0}$ mesons produced in pp and pPb collisions are presented. Nonprompt D$^{0}$ mesons come from beauty hadron decays. The data samples are collected by the CMS experiment at nucleon-nucleon center-of-mass energies of 13 and 8.16 TeV, respectively. In high multiplicity pp collisions, v2 signals for prompt charm hadrons are reported for the first time, and are found to be comparable to those for light-flavor hadron species over a transverse momentum (pT) range of 2–6 GeV. Compared at similar event multiplicities, the prompt D$^{0}$ meson v2 values in pp and pPb collisions are similar in magnitude. The v2 values for open beauty hadrons are extracted for the first time via nonprompt D$^{0}$ mesons in pPb collisions. For pT in the range of 2–5 GeV, the results suggest that v2 for nonprompt D$^{0}$ mesons is smaller than that for prompt D$^{0}$ mesons. These new measurements indicate a positive charm hadron v2 in pp collisions and suggest a mass dependence in v2 between charm and beauty hadrons in the pPb system. These results provide insights into the origin of heavy-flavor quark collectivity in small systems.
T2  - Physics Letters B
T1  - Studies of charm and beauty hadron long-range correlations in pp and pPb collisions at LHC energies
VL  - 813 C
DO  - 10.1016/j.physletb.2020.136036
ER  - 
@article{
author = "Sirunyan, A. M. and Tumasyan, A. and Adam, W. and Ambrogi, F. and Bergauer, T. and Adžić, Petar and Ćirković, Predrag and Đorđević, Miloš and Milenović, Predrag and Milošević, Jovan and Stojanović, Milan",
year = "2021",
abstract = "Measurements of the second Fourier harmonic coefficient (v2) of the azimuthal distributions of prompt and nonprompt D$^{0}$ mesons produced in pp and pPb collisions are presented. Nonprompt D$^{0}$ mesons come from beauty hadron decays. The data samples are collected by the CMS experiment at nucleon-nucleon center-of-mass energies of 13 and 8.16 TeV, respectively. In high multiplicity pp collisions, v2 signals for prompt charm hadrons are reported for the first time, and are found to be comparable to those for light-flavor hadron species over a transverse momentum (pT) range of 2–6 GeV. Compared at similar event multiplicities, the prompt D$^{0}$ meson v2 values in pp and pPb collisions are similar in magnitude. The v2 values for open beauty hadrons are extracted for the first time via nonprompt D$^{0}$ mesons in pPb collisions. For pT in the range of 2–5 GeV, the results suggest that v2 for nonprompt D$^{0}$ mesons is smaller than that for prompt D$^{0}$ mesons. These new measurements indicate a positive charm hadron v2 in pp collisions and suggest a mass dependence in v2 between charm and beauty hadrons in the pPb system. These results provide insights into the origin of heavy-flavor quark collectivity in small systems.",
journal = "Physics Letters B",
title = "Studies of charm and beauty hadron long-range correlations in pp and pPb collisions at LHC energies",
volume = "813 C",
doi = "10.1016/j.physletb.2020.136036"
}
Sirunyan, A. M., Tumasyan, A., Adam, W., Ambrogi, F., Bergauer, T., Adžić, P., Ćirković, P., Đorđević, M., Milenović, P., Milošević, J.,& Stojanović, M.. (2021). Studies of charm and beauty hadron long-range correlations in pp and pPb collisions at LHC energies. in Physics Letters B, 813 C.
https://doi.org/10.1016/j.physletb.2020.136036
Sirunyan AM, Tumasyan A, Adam W, Ambrogi F, Bergauer T, Adžić P, Ćirković P, Đorđević M, Milenović P, Milošević J, Stojanović M. Studies of charm and beauty hadron long-range correlations in pp and pPb collisions at LHC energies. in Physics Letters B. 2021;813 C.
doi:10.1016/j.physletb.2020.136036 .
Sirunyan, A. M., Tumasyan, A., Adam, W., Ambrogi, F., Bergauer, T., Adžić, Petar, Ćirković, Predrag, Đorđević, Miloš, Milenović, Predrag, Milošević, Jovan, Stojanović, Milan, "Studies of charm and beauty hadron long-range correlations in pp and pPb collisions at LHC energies" in Physics Letters B, 813 C (2021),
https://doi.org/10.1016/j.physletb.2020.136036 . .
 1 1 1

#### Reconstruction of signal amplitudes in the CMS electromagnetic calorimeter in the presence of overlapping proton-proton interactions

(2020)

TY  - JOUR
AU  - Sirunyan, A.M.
AU  - Tumasyan, A.
AU  - Adam, W.
AU  - Ambrogi, F.
AU  - Asilar, E.
AU  - Bergauer, T.
AU  - Adžić, Petar
AU  - Ćirković, Predrag
AU  - Devetak, Damir
AU  - Đorđević, Miloš
AU  - Milošević, Jovan
PY  - 2020
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9987
AB  - A template fitting technique for reconstructing the amplitude of signals produced by the lead tungstate crystals of the CMS electromagnetic calorimeter is described. This novel approach is designed to suppress the contribution to the signal of the increased number of out-of-time interactions per beam crossing following the reduction of the accelerator bunch spacing from 50 to 25 ns at the start of Run 2 of the LHC. Execution of the algorithm is sufficiently fast for it to be employed in the CMS high-level trigger. It is also used in the offline event reconstruction. Results obtained from simulations and from Run 2 collision data (2015–2018) demonstrate a substantial improvement in the energy resolution of the calorimeter over a range of energies extending from a few GeV to several tens of GeV.
T2  - Journal of Instrumentation
T1  - Reconstruction of signal amplitudes in the CMS electromagnetic calorimeter in the presence of overlapping proton-proton interactions
VL  - 15
IS  - 10
SP  - P10002
DO  - 10.1088/1748-0221/15/10/P10002
ER  - 
@article{
author = "Sirunyan, A.M. and Tumasyan, A. and Adam, W. and Ambrogi, F. and Asilar, E. and Bergauer, T. and Adžić, Petar and Ćirković, Predrag and Devetak, Damir and Đorđević, Miloš and Milošević, Jovan",
year = "2020",
abstract = "A template fitting technique for reconstructing the amplitude of signals produced by the lead tungstate crystals of the CMS electromagnetic calorimeter is described. This novel approach is designed to suppress the contribution to the signal of the increased number of out-of-time interactions per beam crossing following the reduction of the accelerator bunch spacing from 50 to 25 ns at the start of Run 2 of the LHC. Execution of the algorithm is sufficiently fast for it to be employed in the CMS high-level trigger. It is also used in the offline event reconstruction. Results obtained from simulations and from Run 2 collision data (2015–2018) demonstrate a substantial improvement in the energy resolution of the calorimeter over a range of energies extending from a few GeV to several tens of GeV.",
journal = "Journal of Instrumentation",
title = "Reconstruction of signal amplitudes in the CMS electromagnetic calorimeter in the presence of overlapping proton-proton interactions",
volume = "15",
number = "10",
pages = "P10002",
doi = "10.1088/1748-0221/15/10/P10002"
}
Sirunyan, A.M., Tumasyan, A., Adam, W., Ambrogi, F., Asilar, E., Bergauer, T., Adžić, P., Ćirković, P., Devetak, D., Đorđević, M.,& Milošević, J.. (2020). Reconstruction of signal amplitudes in the CMS electromagnetic calorimeter in the presence of overlapping proton-proton interactions. in Journal of Instrumentation, 15(10), P10002.
https://doi.org/10.1088/1748-0221/15/10/P10002
Sirunyan A, Tumasyan A, Adam W, Ambrogi F, Asilar E, Bergauer T, Adžić P, Ćirković P, Devetak D, Đorđević M, Milošević J. Reconstruction of signal amplitudes in the CMS electromagnetic calorimeter in the presence of overlapping proton-proton interactions. in Journal of Instrumentation. 2020;15(10):P10002.
doi:10.1088/1748-0221/15/10/P10002 .
Sirunyan, A.M., Tumasyan, A., Adam, W., Ambrogi, F., Asilar, E., Bergauer, T., Adžić, Petar, Ćirković, Predrag, Devetak, Damir, Đorđević, Miloš, Milošević, Jovan, "Reconstruction of signal amplitudes in the CMS electromagnetic calorimeter in the presence of overlapping proton-proton interactions" in Journal of Instrumentation, 15, no. 10 (2020):P10002,
https://doi.org/10.1088/1748-0221/15/10/P10002 . .
 1 5 2 6

#### Investigation into the event-activity dependence of ϒ(nS) relative production in proton-proton collisions at √s = 7 TeV

(2020)

TY  - JOUR
AU  - Sirunyan, A.
AU  - Tumasyan, A.
AU  - Adam, W.
AU  - Ambrogi, F.
AU  - Bergauer, T.
AU  - Adžić, Petar
AU  - Ćirković, Predrag
AU  - Đorđević, Miloš
AU  - Milenović, Predrag
AU  - Milošević, Jovan
AU  - Stojanović, Milan
PY  - 2020
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9986
AB  - The ratios of the production cross sections between the excited ϒ(2S) and ϒ(3S) mesons and the ϒ(1S) ground state, detected via their decay into two muons, are studied as a function of the number of charged particles in the event. The data are from proton-proton collisions at s = 7 TeV, corresponding to an integrated luminosity of 4.8 fb−1, collected with the CMS detector at the LHC. Evidence of a decrease in these ratios as a function of the particle multiplicity is observed, more pronounced at low transverse momentum pTμμ. For ϒ(nS) mesons with pTμμ> 7 GeV, where most of the data were collected, the correlation with multiplicity is studied as a function of the underlying event transverse sphericity and the number of particles in a cone around the ϒ(nS) direction. The ratios are found to be multiplicity independent for jet-like events. The mean pTμμ values for the ϒ(nS) states as a function of particle multiplicity are also measured and found to grow more steeply as their mass increases.
T2  - Journal of High Energy Physics
T1  - Investigation into the event-activity dependence of ϒ(nS) relative production in proton-proton collisions at √s = 7 TeV
VL  - 2020
IS  - 11
SP  - 1
EP  - 39
DO  - 10.1007/JHEP11(2020)001
ER  - 
@article{
author = "Sirunyan, A. and Tumasyan, A. and Adam, W. and Ambrogi, F. and Bergauer, T. and Adžić, Petar and Ćirković, Predrag and Đorđević, Miloš and Milenović, Predrag and Milošević, Jovan and Stojanović, Milan",
year = "2020",
abstract = "The ratios of the production cross sections between the excited ϒ(2S) and ϒ(3S) mesons and the ϒ(1S) ground state, detected via their decay into two muons, are studied as a function of the number of charged particles in the event. The data are from proton-proton collisions at s = 7 TeV, corresponding to an integrated luminosity of 4.8 fb−1, collected with the CMS detector at the LHC. Evidence of a decrease in these ratios as a function of the particle multiplicity is observed, more pronounced at low transverse momentum pTμμ. For ϒ(nS) mesons with pTμμ> 7 GeV, where most of the data were collected, the correlation with multiplicity is studied as a function of the underlying event transverse sphericity and the number of particles in a cone around the ϒ(nS) direction. The ratios are found to be multiplicity independent for jet-like events. The mean pTμμ values for the ϒ(nS) states as a function of particle multiplicity are also measured and found to grow more steeply as their mass increases.",
journal = "Journal of High Energy Physics",
title = "Investigation into the event-activity dependence of ϒ(nS) relative production in proton-proton collisions at √s = 7 TeV",
volume = "2020",
number = "11",
pages = "1-39",
doi = "10.1007/JHEP11(2020)001"
}
Sirunyan, A., Tumasyan, A., Adam, W., Ambrogi, F., Bergauer, T., Adžić, P., Ćirković, P., Đorđević, M., Milenović, P., Milošević, J.,& Stojanović, M.. (2020). Investigation into the event-activity dependence of ϒ(nS) relative production in proton-proton collisions at √s = 7 TeV. in Journal of High Energy Physics, 2020(11), 1-39.
https://doi.org/10.1007/JHEP11(2020)001
Sirunyan A, Tumasyan A, Adam W, Ambrogi F, Bergauer T, Adžić P, Ćirković P, Đorđević M, Milenović P, Milošević J, Stojanović M. Investigation into the event-activity dependence of ϒ(nS) relative production in proton-proton collisions at √s = 7 TeV. in Journal of High Energy Physics. 2020;2020(11):1-39.
doi:10.1007/JHEP11(2020)001 .
Sirunyan, A., Tumasyan, A., Adam, W., Ambrogi, F., Bergauer, T., Adžić, Petar, Ćirković, Predrag, Đorđević, Miloš, Milenović, Predrag, Milošević, Jovan, Stojanović, Milan, "Investigation into the event-activity dependence of ϒ(nS) relative production in proton-proton collisions at √s = 7 TeV" in Journal of High Energy Physics, 2020, no. 11 (2020):1-39,
https://doi.org/10.1007/JHEP11(2020)001 . .
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#### W+W− boson pair production in proton-proton collisions at s=13 TeV

(2020)

TY  - JOUR
AU  - Sirunyan, A. M.
AU  - Tumasyan, A.
AU  - Adam, W.
AU  - Ambrogi, F.
AU  - Bergauer, T.
AU  - Adžić, Petar
AU  - Ćirković, Predrag
AU  - Đorđević, Miloš
AU  - Milenović, Predrag
AU  - Milošević, Jovan
PY  - 2020
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9985
AB  - A measurement of the W+W− boson pair production cross section in proton-proton collisions at s=13  TeV is presented. The data used in this study are collected with the CMS detector at the CERN LHC and correspond to an integrated luminosity of 35.9  fb−1. The W+W− candidate events are selected by requiring two oppositely charged leptons (electrons or muons). Two methods for reducing background contributions are employed. In the first one, a sequence of requirements on kinematic quantities is applied allowing a measurement of the total production cross section, 117.6±6.8  pb, which agrees well with the theoretical prediction. Fiducial cross sections are also reported for events with zero or one jet, and the change in the zero-jet fiducial cross section with the jet transverse momentum threshold is measured. Normalized differential cross sections are reported within the fiducial region. A second method for suppressing background contributions employs two random forest classifiers. The analysis based on this method includes a measurement of the total production cross section and also a measurement of the normalized jet multiplicity distribution in W+W− events. Finally, a dilepton invariant mass distribution is used to probe for physics beyond the standard model in the context of an effective field theory, and constraints on the presence of dimension-6 operators are derived.
T2  - Physical Review D
T1  - W+W− boson pair production in proton-proton collisions at s=13 TeV
VL  - 102
SP  - 092001
DO  - 10.1103/PhysRevD.102.092001
ER  - 
@article{
author = "Sirunyan, A. M. and Tumasyan, A. and Adam, W. and Ambrogi, F. and Bergauer, T. and Adžić, Petar and Ćirković, Predrag and Đorđević, Miloš and Milenović, Predrag and Milošević, Jovan",
year = "2020",
abstract = "A measurement of the W+W− boson pair production cross section in proton-proton collisions at s=13  TeV is presented. The data used in this study are collected with the CMS detector at the CERN LHC and correspond to an integrated luminosity of 35.9  fb−1. The W+W− candidate events are selected by requiring two oppositely charged leptons (electrons or muons). Two methods for reducing background contributions are employed. In the first one, a sequence of requirements on kinematic quantities is applied allowing a measurement of the total production cross section, 117.6±6.8  pb, which agrees well with the theoretical prediction. Fiducial cross sections are also reported for events with zero or one jet, and the change in the zero-jet fiducial cross section with the jet transverse momentum threshold is measured. Normalized differential cross sections are reported within the fiducial region. A second method for suppressing background contributions employs two random forest classifiers. The analysis based on this method includes a measurement of the total production cross section and also a measurement of the normalized jet multiplicity distribution in W+W− events. Finally, a dilepton invariant mass distribution is used to probe for physics beyond the standard model in the context of an effective field theory, and constraints on the presence of dimension-6 operators are derived.",
journal = "Physical Review D",
title = "W+W− boson pair production in proton-proton collisions at s=13 TeV",
volume = "102",
pages = "092001",
doi = "10.1103/PhysRevD.102.092001"
}
Sirunyan, A. M., Tumasyan, A., Adam, W., Ambrogi, F., Bergauer, T., Adžić, P., Ćirković, P., Đorđević, M., Milenović, P.,& Milošević, J.. (2020). W+W− boson pair production in proton-proton collisions at s=13 TeV. in Physical Review D, 102, 092001.
https://doi.org/10.1103/PhysRevD.102.092001
Sirunyan A, Tumasyan A, Adam W, Ambrogi F, Bergauer T, Adžić P, Ćirković P, Đorđević M, Milenović P, Milošević J. W+W− boson pair production in proton-proton collisions at s=13 TeV. in Physical Review D. 2020;102:092001.
doi:10.1103/PhysRevD.102.092001 .
Sirunyan, A. M., Tumasyan, A., Adam, W., Ambrogi, F., Bergauer, T., Adžić, Petar, Ćirković, Predrag, Đorđević, Miloš, Milenović, Predrag, Milošević, Jovan, "W+W− boson pair production in proton-proton collisions at s=13 TeV" in Physical Review D, 102 (2020):092001,
https://doi.org/10.1103/PhysRevD.102.092001 . .
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