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 . .

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  - 2020
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8794
AB  - New sets of CMS underlying-event parameters (“tunes”) are presented for the pythia8 event generator. These tunes use the NNPDF3.1 parton distribution functions (PDFs) at leading (LO), next-to-leading (NLO), or next-to-next-to-leading (NNLO) orders in perturbative quantum chromodynamics, and the strong coupling evolution at LO or NLO. Measurements of charged-particle multiplicity and transverse momentum densities at various hadron collision energies are fit simultaneously to determine the parameters of the tunes. Comparisons of the predictions of the new tunes are provided for observables sensitive to the event shapes at LEP, global underlying event, soft multiparton interactions, and double-parton scattering contributions. In addition, comparisons are made for observables measured in various specific processes, such as multijet, Drell–Yan, and top quark-antiquark pair production including jet substructure observables. The simulation of the underlying event provided by the new tunes is interfaced to a higher-order matrix-element calculation. For the first time, predictions from pythia8 obtained with tunes based on NLO or NNLO PDFs are shown to reliably describe minimum-bias and underlying-event data with a similar level of agreement to predictions from tunes using LO PDF sets.
T2  - European Physical Journal C. Particles and Fields
T1  - Extraction and validation of a new set of CMS pythia8 tunes from underlying-event measurements
VL  - 80
IS  - 1
SP  - Article 4
DO  - 10.1140/epjc/s10052-019-7499-4
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 = "2020",
abstract = "New sets of CMS underlying-event parameters (“tunes”) are presented for the pythia8 event generator. These tunes use the NNPDF3.1 parton distribution functions (PDFs) at leading (LO), next-to-leading (NLO), or next-to-next-to-leading (NNLO) orders in perturbative quantum chromodynamics, and the strong coupling evolution at LO or NLO. Measurements of charged-particle multiplicity and transverse momentum densities at various hadron collision energies are fit simultaneously to determine the parameters of the tunes. Comparisons of the predictions of the new tunes are provided for observables sensitive to the event shapes at LEP, global underlying event, soft multiparton interactions, and double-parton scattering contributions. In addition, comparisons are made for observables measured in various specific processes, such as multijet, Drell–Yan, and top quark-antiquark pair production including jet substructure observables. The simulation of the underlying event provided by the new tunes is interfaced to a higher-order matrix-element calculation. For the first time, predictions from pythia8 obtained with tunes based on NLO or NNLO PDFs are shown to reliably describe minimum-bias and underlying-event data with a similar level of agreement to predictions from tunes using LO PDF sets.",
journal = "European Physical Journal C. Particles and Fields",
title = "Extraction and validation of a new set of CMS pythia8 tunes from underlying-event measurements",
volume = "80",
number = "1",
pages = "Article 4",
doi = "10.1140/epjc/s10052-019-7499-4"
}

Sirunyan, A. M., Tumasyan, A., Adam, W., Ambrogi, F., Asilar, E., Adžić, P., Ćirković, P., Devetak, D., Đorđević, M.,& Milošević, J.. (2020). Extraction and validation of a new set of CMS pythia8 tunes from underlying-event measurements. in European Physical Journal C. Particles and Fields, 80(1), Article 4.
https://doi.org/10.1140/epjc/s10052-019-7499-4

Sirunyan AM, Tumasyan A, Adam W, Ambrogi F, Asilar E, Adžić P, Ćirković P, Devetak D, Đorđević M, Milošević J. Extraction and validation of a new set of CMS pythia8 tunes from underlying-event measurements. in European Physical Journal C. Particles and Fields. 2020;80(1):Article 4.
doi:10.1140/epjc/s10052-019-7499-4 .

Sirunyan, A. M., Tumasyan, A., Adam, W., Ambrogi, F., Asilar, E., Adžić, Petar, Ćirković, Predrag, Devetak, Damir, Đorđević, Miloš, Milošević, Jovan, "Extraction and validation of a new set of CMS pythia8 tunes from underlying-event measurements" in European Physical Journal C. Particles and Fields, 80, no. 1 (2020):Article 4,
https://doi.org/10.1140/epjc/s10052-019-7499-4 . .

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
AU  - Milenović, Predrag
PY  - 2020
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8855
AB  - Bose-Einstein correlations of charged hadrons are measured over a broad multiplicity range, from a few particles up to about 250 reconstructed charged hadrons in proton-proton collisions at s = 13 TeV. The results are based on data collected using the CMS detector at the LHC during runs with a special low-pileup configuration. Three analysis techniques with different degrees of dependence on simulations are used to remove the non-Bose-Einstein background from the correlation functions. All three methods give consistent results. The measured lengths of homogeneity are studied as functions of particle multiplicity as well as average pair transverse momentum and mass. The results are compared with data from both CMS and ATLAS at s = 7 TeV, as well as with theoretical predictions.
T2  - Journal of High Energy Physics
T1  - Bose-Einstein correlations of charged hadrons in proton-proton collisions at √s = 13 TeV
VL  - 2020
IS  - 3
SP  - 14
DO  - 10.1007/JHEP03(2020)014
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 and Milenović, Predrag",
year = "2020",
abstract = "Bose-Einstein correlations of charged hadrons are measured over a broad multiplicity range, from a few particles up to about 250 reconstructed charged hadrons in proton-proton collisions at s = 13 TeV. The results are based on data collected using the CMS detector at the LHC during runs with a special low-pileup configuration. Three analysis techniques with different degrees of dependence on simulations are used to remove the non-Bose-Einstein background from the correlation functions. All three methods give consistent results. The measured lengths of homogeneity are studied as functions of particle multiplicity as well as average pair transverse momentum and mass. The results are compared with data from both CMS and ATLAS at s = 7 TeV, as well as with theoretical predictions.",
journal = "Journal of High Energy Physics",
title = "Bose-Einstein correlations of charged hadrons in proton-proton collisions at √s = 13 TeV",
volume = "2020",
number = "3",
pages = "14",
doi = "10.1007/JHEP03(2020)014"
}

Sirunyan, A. M., Tumasyan, A., Adam, W., Ambrogi, F., Asilar, E., Adžić, P., Ćirković, P., Devetak, D., Đorđević, M., Milošević, J.,& Milenović, P.. (2020). Bose-Einstein correlations of charged hadrons in proton-proton collisions at √s = 13 TeV. in Journal of High Energy Physics, 2020(3), 14.
https://doi.org/10.1007/JHEP03(2020)014

Sirunyan AM, Tumasyan A, Adam W, Ambrogi F, Asilar E, Adžić P, Ćirković P, Devetak D, Đorđević M, Milošević J, Milenović P. Bose-Einstein correlations of charged hadrons in proton-proton collisions at √s = 13 TeV. in Journal of High Energy Physics. 2020;2020(3):14.
doi:10.1007/JHEP03(2020)014 .

Sirunyan, A. M., Tumasyan, A., Adam, W., Ambrogi, F., Asilar, E., Adžić, Petar, Ćirković, Predrag, Devetak, Damir, Đorđević, Miloš, Milošević, Jovan, Milenović, Predrag, "Bose-Einstein correlations of charged hadrons in proton-proton collisions at √s = 13 TeV" in Journal of High Energy Physics, 2020, no. 3 (2020):14,
https://doi.org/10.1007/JHEP03(2020)014 . .

TY  - JOUR
AU  - Sirunyan, A. M.
AU  - Tumasyan, A.
AU  - Adam, W.
AU  - Ambrogi, F.
AU  - Asilar, E.
AU  - Okhotnikov, V.
AU  - Adžić, Petar
AU  - Ćirković, Predrag
AU  - Devetak, Damir
AU  - Đorđević, Miloš
AU  - Milenović, Predrag
PY  - 2020
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9647
AB  - Normalised multi-differential cross sections for top quark pair (t t ¯) production are measured in proton-proton collisions at a centre-of-mass energy of 13TeV using events containing two oppositely charged leptons. The analysed data were recorded with the CMS detector in 2016 and correspond to an integrated luminosity of 35.9fb-1. The double-differential t t ¯ cross section is measured as a function of the kinematic properties of the top quark and of the t t ¯ system at parton level in the full phase space. A triple-differential measurement is performed as a function of the invariant mass and rapidity of the t t ¯ system and the multiplicity of additional jets at particle level. The data are compared to predictions of Monte Carlo event generators that complement next-to-leading-order (NLO) quantum chromodynamics (QCD) calculations with parton showers. Together with a fixed-order NLO QCD calculation, the triple-differential measurement is used to extract values of the strong coupling strength αS and the top quark pole mass (mtpole) using several sets of parton distribution functions (PDFs). The measurement of mtpole exploits the sensitivity of the t t ¯ invariant mass distribution to mtpole near the production threshold. Furthermore, a simultaneous fit of the PDFs, αS, and mtpole is performed at NLO, demonstrating that the new data have significant impact on the gluon PDF, and at the same time allow an accurate determination of αS and mtpole. The values αS(mZ)=0.1135-0.0017+0.0021 and mtpole=170.5±0.8GeV are extracted, which account for experimental and theoretical uncertainties, the latter being estimated from NLO scale variations. Possible effects from Coulomb and soft-gluon resummation near the t t ¯ production threshold are neglected in these parameter extractions. A rough estimate of these effects indicates an expected correction of mtpole of the order of +1GeV, which can be regarded as additional theoretical uncertainty in the current mtpole extraction.
T2  - European Physical Journal C. Particles and Fields
T1  - Measurement of t t ¯ normalised multi-differential cross sections in pp collisions at √s=13TeV , and simultaneous determination of the strong coupling strength, top quark pole mass, and parton distribution functions
VL  - 80
IS  - 7
SP  - 658
DO  - 10.1140/epjc/s10052-020-7917-7
ER  - 

@article{
author = "Sirunyan, A. M. and Tumasyan, A. and Adam, W. and Ambrogi, F. and Asilar, E. and Okhotnikov, V. and Adžić, Petar and Ćirković, Predrag and Devetak, Damir and Đorđević, Miloš and Milenović, Predrag",
year = "2020",
abstract = "Normalised multi-differential cross sections for top quark pair (t t ¯) production are measured in proton-proton collisions at a centre-of-mass energy of 13TeV using events containing two oppositely charged leptons. The analysed data were recorded with the CMS detector in 2016 and correspond to an integrated luminosity of 35.9fb-1. The double-differential t t ¯ cross section is measured as a function of the kinematic properties of the top quark and of the t t ¯ system at parton level in the full phase space. A triple-differential measurement is performed as a function of the invariant mass and rapidity of the t t ¯ system and the multiplicity of additional jets at particle level. The data are compared to predictions of Monte Carlo event generators that complement next-to-leading-order (NLO) quantum chromodynamics (QCD) calculations with parton showers. Together with a fixed-order NLO QCD calculation, the triple-differential measurement is used to extract values of the strong coupling strength αS and the top quark pole mass (mtpole) using several sets of parton distribution functions (PDFs). The measurement of mtpole exploits the sensitivity of the t t ¯ invariant mass distribution to mtpole near the production threshold. Furthermore, a simultaneous fit of the PDFs, αS, and mtpole is performed at NLO, demonstrating that the new data have significant impact on the gluon PDF, and at the same time allow an accurate determination of αS and mtpole. The values αS(mZ)=0.1135-0.0017+0.0021 and mtpole=170.5±0.8GeV are extracted, which account for experimental and theoretical uncertainties, the latter being estimated from NLO scale variations. Possible effects from Coulomb and soft-gluon resummation near the t t ¯ production threshold are neglected in these parameter extractions. A rough estimate of these effects indicates an expected correction of mtpole of the order of +1GeV, which can be regarded as additional theoretical uncertainty in the current mtpole extraction.",
journal = "European Physical Journal C. Particles and Fields",
title = "Measurement of t t ¯ normalised multi-differential cross sections in pp collisions at √s=13TeV , and simultaneous determination of the strong coupling strength, top quark pole mass, and parton distribution functions",
volume = "80",
number = "7",
pages = "658",
doi = "10.1140/epjc/s10052-020-7917-7"
}

Sirunyan, A. M., Tumasyan, A., Adam, W., Ambrogi, F., Asilar, E., Okhotnikov, V., Adžić, P., Ćirković, P., Devetak, D., Đorđević, M.,& Milenović, P.. (2020). Measurement of t t ¯ normalised multi-differential cross sections in pp collisions at √s=13TeV , and simultaneous determination of the strong coupling strength, top quark pole mass, and parton distribution functions. in European Physical Journal C. Particles and Fields, 80(7), 658.
https://doi.org/10.1140/epjc/s10052-020-7917-7

Sirunyan AM, Tumasyan A, Adam W, Ambrogi F, Asilar E, Okhotnikov V, Adžić P, Ćirković P, Devetak D, Đorđević M, Milenović P. Measurement of t t ¯ normalised multi-differential cross sections in pp collisions at √s=13TeV , and simultaneous determination of the strong coupling strength, top quark pole mass, and parton distribution functions. in European Physical Journal C. Particles and Fields. 2020;80(7):658.
doi:10.1140/epjc/s10052-020-7917-7 .

Sirunyan, A. M., Tumasyan, A., Adam, W., Ambrogi, F., Asilar, E., Okhotnikov, V., Adžić, Petar, Ćirković, Predrag, Devetak, Damir, Đorđević, Miloš, Milenović, Predrag, "Measurement of t t ¯ normalised multi-differential cross sections in pp collisions at √s=13TeV , and simultaneous determination of the strong coupling strength, top quark pole mass, and parton distribution functions" in European Physical Journal C. Particles and Fields, 80, no. 7 (2020):658,
https://doi.org/10.1140/epjc/s10052-020-7917-7 . .

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  - 2020
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9695
AB  - The transverse momentum (pT) distributions of Λ, Ξ−, and Ω− baryons, their antiparticles, and KS0 mesons are measured in proton-proton (pp) and proton-lead (pPb) collisions at a nucleon-nucleon center-of-mass energy of 5.02 TeV over a broad rapidity range. The data, corresponding to integrated luminosities of 40.2 nb−1 and 15.6 μb−1 for pp and pPb collisions, respectively, were collected by the CMS experiment. The nuclear modification factor RpPb, which is defined as the ratio of the particle yield in pPb collisions and a scaled pp reference, is measured for each particle. A strong dependence on particle species is observed in the pT range from 2 to 7 GeV, where RpPb for KS0 is consistent with unity, while an enhancement ordered by strangeness content and/or particle mass is observed for the three baryons. In pPb collisions, the strange hadron production is asymmetric about the nucleon-nucleon center-of-mass rapidity. Enhancements, which depend on the particle type, are observed in the direction of the Pb beam. The results are compared with predictions from epos lhc, which includes parametrized radial flow. The model is in qualitative agreement with the RpPb data, but fails to describe the dependence on particle species in the yield asymmetries measured away from midrapidity in pPb collisions.
T2  - Physical Review C
T1  - Strange hadron production in pp and pPb collisions at sNN=5.02 TeV
VL  - 101
SP  - 064906
DO  - 10.1103/PhysRevC.101.064906
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 = "2020",
abstract = "The transverse momentum (pT) distributions of Λ, Ξ−, and Ω− baryons, their antiparticles, and KS0 mesons are measured in proton-proton (pp) and proton-lead (pPb) collisions at a nucleon-nucleon center-of-mass energy of 5.02 TeV over a broad rapidity range. The data, corresponding to integrated luminosities of 40.2 nb−1 and 15.6 μb−1 for pp and pPb collisions, respectively, were collected by the CMS experiment. The nuclear modification factor RpPb, which is defined as the ratio of the particle yield in pPb collisions and a scaled pp reference, is measured for each particle. A strong dependence on particle species is observed in the pT range from 2 to 7 GeV, where RpPb for KS0 is consistent with unity, while an enhancement ordered by strangeness content and/or particle mass is observed for the three baryons. In pPb collisions, the strange hadron production is asymmetric about the nucleon-nucleon center-of-mass rapidity. Enhancements, which depend on the particle type, are observed in the direction of the Pb beam. The results are compared with predictions from epos lhc, which includes parametrized radial flow. The model is in qualitative agreement with the RpPb data, but fails to describe the dependence on particle species in the yield asymmetries measured away from midrapidity in pPb collisions.",
journal = "Physical Review C",
title = "Strange hadron production in pp and pPb collisions at sNN=5.02 TeV",
volume = "101",
pages = "064906",
doi = "10.1103/PhysRevC.101.064906"
}

Sirunyan, A. M., Tumasyan, A., Adam, W., Ambrogi, F., Asilar, E., Adžić, P., Ćirković, P., Devetak, D., Đorđević, M.,& Milošević, J.. (2020). Strange hadron production in pp and pPb collisions at sNN=5.02 TeV. in Physical Review C, 101, 064906.
https://doi.org/10.1103/PhysRevC.101.064906

Sirunyan AM, Tumasyan A, Adam W, Ambrogi F, Asilar E, Adžić P, Ćirković P, Devetak D, Đorđević M, Milošević J. Strange hadron production in pp and pPb collisions at sNN=5.02 TeV. in Physical Review C. 2020;101:064906.
doi:10.1103/PhysRevC.101.064906 .

Sirunyan, A. M., Tumasyan, A., Adam, W., Ambrogi, F., Asilar, E., Adžić, Petar, Ćirković, Predrag, Devetak, Damir, Đorđević, Miloš, Milošević, Jovan, "Strange hadron production in pp and pPb collisions at sNN=5.02 TeV" in Physical Review C, 101 (2020):064906,
https://doi.org/10.1103/PhysRevC.101.064906 . .

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  - 2019
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8756
AB  - Measurements of the cross sections for the production of single top quarks and antiquarks in the t channel, and their ratio, are presented for proton-proton collisions at a center-of-mass energy of 13 TeV. The data set used was recorded in 2016 by the CMS detector at the LHC and corresponds to an integrated luminosity of 35.9 fb−1. Events with one muon or electron are selected, and different categories of jet and b jet multiplicity and multivariate discriminators are applied to separate the signal from the background. The cross sections for the t-channel production of single top quarks and antiquarks are measured to be 130±1(stat)±19(syst)pb and 77±1(stat)±12(syst)pb, respectively, and their ratio is 1.68±0.02(stat)±0.05(syst). The results are in agreement with the predictions from the standard model.
T2  - Physics Letters B
T1  - Measurement of the single top quark and antiquark production cross sections in the t channel and their ratio in proton-proton collisions at s=13TeV
VL  - 800 C
DO  - 10.1016/j.physletb.2019.135042
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 = "2019",
abstract = "Measurements of the cross sections for the production of single top quarks and antiquarks in the t channel, and their ratio, are presented for proton-proton collisions at a center-of-mass energy of 13 TeV. The data set used was recorded in 2016 by the CMS detector at the LHC and corresponds to an integrated luminosity of 35.9 fb−1. Events with one muon or electron are selected, and different categories of jet and b jet multiplicity and multivariate discriminators are applied to separate the signal from the background. The cross sections for the t-channel production of single top quarks and antiquarks are measured to be 130±1(stat)±19(syst)pb and 77±1(stat)±12(syst)pb, respectively, and their ratio is 1.68±0.02(stat)±0.05(syst). The results are in agreement with the predictions from the standard model.",
journal = "Physics Letters B",
title = "Measurement of the single top quark and antiquark production cross sections in the t channel and their ratio in proton-proton collisions at s=13TeV",
volume = "800 C",
doi = "10.1016/j.physletb.2019.135042"
}

Sirunyan, A. M., Tumasyan, A., Adam, W., Ambrogi, F., Asilar, E., Adžić, P., Ćirković, P., Devetak, D., Đorđević, M.,& Milošević, J.. (2019). Measurement of the single top quark and antiquark production cross sections in the t channel and their ratio in proton-proton collisions at s=13TeV. in Physics Letters B, 800 C.
https://doi.org/10.1016/j.physletb.2019.135042

Sirunyan AM, Tumasyan A, Adam W, Ambrogi F, Asilar E, Adžić P, Ćirković P, Devetak D, Đorđević M, Milošević J. Measurement of the single top quark and antiquark production cross sections in the t channel and their ratio in proton-proton collisions at s=13TeV. in Physics Letters B. 2019;800 C.
doi:10.1016/j.physletb.2019.135042 .

Sirunyan, A. M., Tumasyan, A., Adam, W., Ambrogi, F., Asilar, E., Adžić, Petar, Ćirković, Predrag, Devetak, Damir, Đorđević, Miloš, Milošević, Jovan, "Measurement of the single top quark and antiquark production cross sections in the t channel and their ratio in proton-proton collisions at s=13TeV" in Physics Letters B, 800 C (2019),
https://doi.org/10.1016/j.physletb.2019.135042 . .

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  - Milenović, Predrag
AU  - Milošević, Jovan
PY  - 2019
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8762
AB  - A study is presented of anomalous HVV interactions of the Higgs boson, including its CP properties. The study uses Higgs boson candidates produced mainly in vector boson fusion and gluon fusion that subsequently decay to a pair of τ leptons. The data were recorded by the CMS experiment at the LHC in 2016 at a center-of-mass energy of 13 TeV and correspond to an integrated luminosity of 35.9  fb−1. A matrix element technique is employed for the analysis of anomalous interactions. The results are combined with those from the H→4ℓ decay channel presented earlier, yielding the most stringent constraints on anomalous Higgs boson couplings to electroweak vector bosons expressed as effective cross section fractions and phases: the CP-violating parameter fa3cos(ϕa3)=(0.00±0.27)×10−3 and the CP-conserving parameters fa2cos(ϕa2)=(0.08−0.21+1.04)×10−3, fΛ1cos(ϕΛ1)=(0.00−0.09+0.53)×10−3, and fΛ1Zγcos(ϕΛ1Zγ)=(0.0−1.3+1.1)×10−3. The current dataset does not allow for precise constraints on CP properties in the gluon fusion process. The results are consistent with standard model expectations.
T2  - Physical Review D
T1  - Constraints on anomalous HVV couplings from the production of Higgs bosons decaying to τ lepton pairs
VL  - 100
DO  - 10.1103/PhysRevD.100.112002
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 Milenović, Predrag and Milošević, Jovan",
year = "2019",
abstract = "A study is presented of anomalous HVV interactions of the Higgs boson, including its CP properties. The study uses Higgs boson candidates produced mainly in vector boson fusion and gluon fusion that subsequently decay to a pair of τ leptons. The data were recorded by the CMS experiment at the LHC in 2016 at a center-of-mass energy of 13 TeV and correspond to an integrated luminosity of 35.9  fb−1. A matrix element technique is employed for the analysis of anomalous interactions. The results are combined with those from the H→4ℓ decay channel presented earlier, yielding the most stringent constraints on anomalous Higgs boson couplings to electroweak vector bosons expressed as effective cross section fractions and phases: the CP-violating parameter fa3cos(ϕa3)=(0.00±0.27)×10−3 and the CP-conserving parameters fa2cos(ϕa2)=(0.08−0.21+1.04)×10−3, fΛ1cos(ϕΛ1)=(0.00−0.09+0.53)×10−3, and fΛ1Zγcos(ϕΛ1Zγ)=(0.0−1.3+1.1)×10−3. The current dataset does not allow for precise constraints on CP properties in the gluon fusion process. The results are consistent with standard model expectations.",
journal = "Physical Review D",
title = "Constraints on anomalous HVV couplings from the production of Higgs bosons decaying to τ lepton pairs",
volume = "100",
doi = "10.1103/PhysRevD.100.112002"
}

Sirunyan, A. M., Tumasyan, A., Adam, W., Ambrogi, F., Asilar, E., Adžić, P., Ćirković, P., Devetak, D., Đorđević, M., Milenović, P.,& Milošević, J.. (2019). Constraints on anomalous HVV couplings from the production of Higgs bosons decaying to τ lepton pairs. in Physical Review D, 100.
https://doi.org/10.1103/PhysRevD.100.112002

Sirunyan AM, Tumasyan A, Adam W, Ambrogi F, Asilar E, Adžić P, Ćirković P, Devetak D, Đorđević M, Milenović P, Milošević J. Constraints on anomalous HVV couplings from the production of Higgs bosons decaying to τ lepton pairs. in Physical Review D. 2019;100.
doi:10.1103/PhysRevD.100.112002 .

Sirunyan, A. M., Tumasyan, A., Adam, W., Ambrogi, F., Asilar, E., Adžić, Petar, Ćirković, Predrag, Devetak, Damir, Đorđević, Miloš, Milenović, Predrag, Milošević, Jovan, "Constraints on anomalous HVV couplings from the production of Higgs bosons decaying to τ lepton pairs" in Physical Review D, 100 (2019),
https://doi.org/10.1103/PhysRevD.100.112002 . .

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
AU  - Milenović, Predrag
PY  - 2019
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8764
AB  - Measurements of the differential cross section for the Drell-Yan process, based on proton-proton collision data at a centre-of-mass energy of 13 TeV, collected by the CMS experiment, are presented. The data correspond to an integrated luminosity of 2.8 (2.3) fb−1 in the dimuon (dielectron) channel. The total and fiducial cross section measurements are presented as a function of dilepton invariant mass in the range 15 to 3000 GeV, and compared with the perturbative predictions of the standard model. The measured differential cross sections are in good agreement with the theoretical calculations.
T2  - Journal of High Energy Physics
T1  - Measurement of the differential Drell-Yan cross section in proton-proton collisions at √s = 13 TeV
VL  - 2019
IS  - 12
SP  - 1
EP  - 48
DO  - 10.1007/JHEP12(2019)059
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 and Milenović, Predrag",
year = "2019",
abstract = "Measurements of the differential cross section for the Drell-Yan process, based on proton-proton collision data at a centre-of-mass energy of 13 TeV, collected by the CMS experiment, are presented. The data correspond to an integrated luminosity of 2.8 (2.3) fb−1 in the dimuon (dielectron) channel. The total and fiducial cross section measurements are presented as a function of dilepton invariant mass in the range 15 to 3000 GeV, and compared with the perturbative predictions of the standard model. The measured differential cross sections are in good agreement with the theoretical calculations.",
journal = "Journal of High Energy Physics",
title = "Measurement of the differential Drell-Yan cross section in proton-proton collisions at √s = 13 TeV",
volume = "2019",
number = "12",
pages = "1-48",
doi = "10.1007/JHEP12(2019)059"
}

Sirunyan, A. M., Tumasyan, A., Adam, W., Ambrogi, F., Asilar, E., Adžić, P., Ćirković, P., Devetak, D., Đorđević, M., Milošević, J.,& Milenović, P.. (2019). Measurement of the differential Drell-Yan cross section in proton-proton collisions at √s = 13 TeV. in Journal of High Energy Physics, 2019(12), 1-48.
https://doi.org/10.1007/JHEP12(2019)059

Sirunyan AM, Tumasyan A, Adam W, Ambrogi F, Asilar E, Adžić P, Ćirković P, Devetak D, Đorđević M, Milošević J, Milenović P. Measurement of the differential Drell-Yan cross section in proton-proton collisions at √s = 13 TeV. in Journal of High Energy Physics. 2019;2019(12):1-48.
doi:10.1007/JHEP12(2019)059 .

Sirunyan, A. M., Tumasyan, A., Adam, W., Ambrogi, F., Asilar, E., Adžić, Petar, Ćirković, Predrag, Devetak, Damir, Đorđević, Miloš, Milošević, Jovan, Milenović, Predrag, "Measurement of the differential Drell-Yan cross section in proton-proton collisions at √s = 13 TeV" in Journal of High Energy Physics, 2019, no. 12 (2019):1-48,
https://doi.org/10.1007/JHEP12(2019)059 . .

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  - Milenović, Predrag
AU  - Milošević, Jovan
PY  - 2019
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8419
AB  - An embedding technique is presented to estimate standard model it backgrounds from data with minimal simulation input. In the data, the muons are removed from reconstructed nn events and replaced with simulated tau leptons with the same kinematic properties. In this way, a set of hybrid events is obtained that does not rely on simulation except for the decay of the tau leptons. The challenges in describing the underlying event or the production of associated jets in the simulation are avoided. The technique described in this paper was developed for CMS. Its validation and the inherent uncertainties are also discussed. The demonstration of the performance of the technique is based on a sample of proton-proton collisions collected by CMS in 2017 at √s = 13 TeV corresponding to an integrated luminosity o 41.5 fb-1. © 2019 CERN for the benefit of the CMS collaboration. Published by IOP Publishing Ltd on behalf of Sissa Medialab. Original content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence.
T2  - Journal of Instrumentation
T1  - An embedding technique to determine ττ backgrounds in proton-proton collision data
VL  - 14
IS  - 6
DO  - 10.1088/1748-0221/14/06/P06032
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 Milenović, Predrag and Milošević, Jovan",
year = "2019",
abstract = "An embedding technique is presented to estimate standard model it backgrounds from data with minimal simulation input. In the data, the muons are removed from reconstructed nn events and replaced with simulated tau leptons with the same kinematic properties. In this way, a set of hybrid events is obtained that does not rely on simulation except for the decay of the tau leptons. The challenges in describing the underlying event or the production of associated jets in the simulation are avoided. The technique described in this paper was developed for CMS. Its validation and the inherent uncertainties are also discussed. The demonstration of the performance of the technique is based on a sample of proton-proton collisions collected by CMS in 2017 at √s = 13 TeV corresponding to an integrated luminosity o 41.5 fb-1. © 2019 CERN for the benefit of the CMS collaboration. Published by IOP Publishing Ltd on behalf of Sissa Medialab. Original content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence.",
journal = "Journal of Instrumentation",
title = "An embedding technique to determine ττ backgrounds in proton-proton collision data",
volume = "14",
number = "6",
doi = "10.1088/1748-0221/14/06/P06032"
}

Sirunyan, A. M., Tumasyan, A., Adam, W., Ambrogi, F., Asilar, E., Adžić, P., Ćirković, P., Devetak, D., Đorđević, M., Milenović, P.,& Milošević, J.. (2019). An embedding technique to determine ττ backgrounds in proton-proton collision data. in Journal of Instrumentation, 14(6).
https://doi.org/10.1088/1748-0221/14/06/P06032

Sirunyan AM, Tumasyan A, Adam W, Ambrogi F, Asilar E, Adžić P, Ćirković P, Devetak D, Đorđević M, Milenović P, Milošević J. An embedding technique to determine ττ backgrounds in proton-proton collision data. in Journal of Instrumentation. 2019;14(6).
doi:10.1088/1748-0221/14/06/P06032 .

Sirunyan, A. M., Tumasyan, A., Adam, W., Ambrogi, F., Asilar, E, Adžić, Petar, Ćirković, Predrag, Devetak, Damir, Đorđević, Miloš, Milenović, Predrag, Milošević, Jovan, "An embedding technique to determine ττ backgrounds in proton-proton collision data" in Journal of Instrumentation, 14, no. 6 (2019),
https://doi.org/10.1088/1748-0221/14/06/P06032 . .

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  - Milenović, Predrag
AU  - Milošević, Jovan
PY  - 2019
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8418
AB  - A search is presented for charged Higgs bosons in the H± ? t±?t decay mode in the hadronic final state and in final states with an electron or a muon. The search is based on proton-proton collision data recorded by the CMS experiment in 2016 at a center-of-mass energy of 13 TeV, corresponding to an integrated luminosity of 35.9 fb-1. The results agree with the background expectation from the standard model. Upper limits at 95% confidence level are set on the production cross section times branching fraction to t±?t for an H± in the mass range of 80GeV to 3TeV, including the region near the top quark mass. The observed limit ranges from 6 pb at 80 GeV to 5 fb at 3 TeV. The limits are interpreted in the context of the minimal supersymmetric standard model mh hod - scenario.[Figure not available: see fulltext.]. © 2019, The Author(s).
T2  - Journal of High Energy Physics
T1  - Search for charged Higgs bosons in the H± ? t ± ?t decay channel in proton-proton collisions at √s=13 TeV
VL  - 2019
IS  - 7
DO  - 10.1007/JHEP07(2019)142
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 Milenović, Predrag and Milošević, Jovan",
year = "2019",
abstract = "A search is presented for charged Higgs bosons in the H± ? t±?t decay mode in the hadronic final state and in final states with an electron or a muon. The search is based on proton-proton collision data recorded by the CMS experiment in 2016 at a center-of-mass energy of 13 TeV, corresponding to an integrated luminosity of 35.9 fb-1. The results agree with the background expectation from the standard model. Upper limits at 95% confidence level are set on the production cross section times branching fraction to t±?t for an H± in the mass range of 80GeV to 3TeV, including the region near the top quark mass. The observed limit ranges from 6 pb at 80 GeV to 5 fb at 3 TeV. The limits are interpreted in the context of the minimal supersymmetric standard model mh hod - scenario.[Figure not available: see fulltext.]. © 2019, The Author(s).",
journal = "Journal of High Energy Physics",
title = "Search for charged Higgs bosons in the H± ? t ± ?t decay channel in proton-proton collisions at √s=13 TeV",
volume = "2019",
number = "7",
doi = "10.1007/JHEP07(2019)142"
}

Sirunyan, A. M., Tumasyan, A., Adam, W., Ambrogi, F., Asilar, E., Adžić, P., Ćirković, P., Devetak, D., Đorđević, M., Milenović, P.,& Milošević, J.. (2019). Search for charged Higgs bosons in the H± ? t ± ?t decay channel in proton-proton collisions at √s=13 TeV. in Journal of High Energy Physics, 2019(7).
https://doi.org/10.1007/JHEP07(2019)142

Sirunyan AM, Tumasyan A, Adam W, Ambrogi F, Asilar E, Adžić P, Ćirković P, Devetak D, Đorđević M, Milenović P, Milošević J. Search for charged Higgs bosons in the H± ? t ± ?t decay channel in proton-proton collisions at √s=13 TeV. in Journal of High Energy Physics. 2019;2019(7).
doi:10.1007/JHEP07(2019)142 .

Sirunyan, A. M., Tumasyan, A., Adam, W., Ambrogi, F., Asilar, E, Adžić, Petar, Ćirković, Predrag, Devetak, Damir, Đorđević, Miloš, Milenović, Predrag, Milošević, Jovan, "Search for charged Higgs bosons in the H± ? t ± ?t decay channel in proton-proton collisions at √s=13 TeV" in Journal of High Energy Physics, 2019, no. 7 (2019),
https://doi.org/10.1007/JHEP07(2019)142 . .

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  - 2019
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8417
AB  - A search for new light bosons decaying into muon pairs is presented using a data sample corresponding to an integrated luminosity of 35.9fb−1 of proton-proton collisions at a center-of-mass energy s=13TeV, collected with the CMS detector at the CERN LHC. The search is model independent, only requiring the pair production of a new light boson and its subsequent decay to a pair of muons. No significant deviation from the predicted background is observed. A model independent limit is set on the product of the production cross section times branching fraction to dimuons squared times acceptance as a function of new light boson mass. This limit varies between 0.15 and 0.39 fb over a range of new light boson masses from 0.25 to 8.5 GeV. It is then interpreted in the context of the next-to-minimal supersymmetric standard model and a dark supersymmetry model that allows for nonnegligible light boson lifetimes. In both cases, there is significant improvement over previously published limits. © 2019 The Author(s)
T2  - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
T1  - A search for pair production of new light bosons decaying into muons in proton-proton collisions at 13 TeV
VL  - 796
SP  - 131
EP  - 154
DO  - 10.1016/j.physletb.2019.07.013
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 = "2019",
abstract = "A search for new light bosons decaying into muon pairs is presented using a data sample corresponding to an integrated luminosity of 35.9fb−1 of proton-proton collisions at a center-of-mass energy s=13TeV, collected with the CMS detector at the CERN LHC. The search is model independent, only requiring the pair production of a new light boson and its subsequent decay to a pair of muons. No significant deviation from the predicted background is observed. A model independent limit is set on the product of the production cross section times branching fraction to dimuons squared times acceptance as a function of new light boson mass. This limit varies between 0.15 and 0.39 fb over a range of new light boson masses from 0.25 to 8.5 GeV. It is then interpreted in the context of the next-to-minimal supersymmetric standard model and a dark supersymmetry model that allows for nonnegligible light boson lifetimes. In both cases, there is significant improvement over previously published limits. © 2019 The Author(s)",
journal = "Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics",
title = "A search for pair production of new light bosons decaying into muons in proton-proton collisions at 13 TeV",
volume = "796",
pages = "131-154",
doi = "10.1016/j.physletb.2019.07.013"
}

Sirunyan, A. M., Tumasyan, A., Adam, W., Ambrogi, F., Asilar, E., Adžić, P., Ćirković, P., Devetak, D., Đorđević, M.,& Milošević, J.. (2019). A search for pair production of new light bosons decaying into muons in proton-proton collisions at 13 TeV. in Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 796, 131-154.
https://doi.org/10.1016/j.physletb.2019.07.013

Sirunyan AM, Tumasyan A, Adam W, Ambrogi F, Asilar E, Adžić P, Ćirković P, Devetak D, Đorđević M, Milošević J. A search for pair production of new light bosons decaying into muons in proton-proton collisions at 13 TeV. in Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics. 2019;796:131-154.
doi:10.1016/j.physletb.2019.07.013 .

Sirunyan, A. M., Tumasyan, A., Adam, W., Ambrogi, F., Asilar, E, Adžić, Petar, Ćirković, Predrag, Devetak, Damir, Đorđević, Miloš, Milošević, Jovan, "A search for pair production of new light bosons decaying into muons in proton-proton collisions at 13 TeV" in Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 796 (2019):131-154,
https://doi.org/10.1016/j.physletb.2019.07.013 . .

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  - 2019
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8416
AB  - The production cross sections of Bs 0 mesons and charge conjugates are measured in proton-proton (pp) and PbPb collisions via the exclusive decay channel Bs 0→J/ψϕ→μ+μ−K+K− at a center-of-mass energy of 5.02 TeV per nucleon pair and within the rapidity range |y|<2.4 using the CMS detector at the LHC. The pp measurement is performed as a function of transverse momentum (pT) of the Bs 0 mesons in the range of 7 to 50 GeV/c and is compared to the predictions of perturbative QCD calculations. The Bs 0 production yield in PbPb collisions is measured in two pT intervals, 7 to 15 and 15 to 50 GeV/c, and compared to the yield in pp collisions in the same kinematic region. The nuclear modification factor (RAA) is found to be 1.5±0.6(stat)±0.5(syst) for 7–15 GeV/c, and 0.87±0.30(stat)±0.17(syst) for 15–50 GeV/c, respectively. Within current uncertainties, the Bs 0 results are consistent with models of strangeness enhancement, and suppression by parton energy loss, as observed for the B+ mesons. © 2019
T2  - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
T1  - Measurement of Bs 0 meson production in pp and PbPb collisions at sNN=5.02 TeV
VL  - 796
SP  - 168
EP  - 190
DO  - 10.1016/j.physletb.2019.07.014
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 = "2019",
abstract = "The production cross sections of Bs 0 mesons and charge conjugates are measured in proton-proton (pp) and PbPb collisions via the exclusive decay channel Bs 0→J/ψϕ→μ+μ−K+K− at a center-of-mass energy of 5.02 TeV per nucleon pair and within the rapidity range |y|<2.4 using the CMS detector at the LHC. The pp measurement is performed as a function of transverse momentum (pT) of the Bs 0 mesons in the range of 7 to 50 GeV/c and is compared to the predictions of perturbative QCD calculations. The Bs 0 production yield in PbPb collisions is measured in two pT intervals, 7 to 15 and 15 to 50 GeV/c, and compared to the yield in pp collisions in the same kinematic region. The nuclear modification factor (RAA) is found to be 1.5±0.6(stat)±0.5(syst) for 7–15 GeV/c, and 0.87±0.30(stat)±0.17(syst) for 15–50 GeV/c, respectively. Within current uncertainties, the Bs 0 results are consistent with models of strangeness enhancement, and suppression by parton energy loss, as observed for the B+ mesons. © 2019",
journal = "Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics",
title = "Measurement of Bs 0 meson production in pp and PbPb collisions at sNN=5.02 TeV",
volume = "796",
pages = "168-190",
doi = "10.1016/j.physletb.2019.07.014"
}

Sirunyan, A. M., Tumasyan, A., Adam, W., Ambrogi, F., Asilar, E., Adžić, P., Ćirković, P., Devetak, D., Đorđević, M.,& Milošević, J.. (2019). Measurement of Bs 0 meson production in pp and PbPb collisions at sNN=5.02 TeV. in Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 796, 168-190.
https://doi.org/10.1016/j.physletb.2019.07.014

Sirunyan AM, Tumasyan A, Adam W, Ambrogi F, Asilar E, Adžić P, Ćirković P, Devetak D, Đorđević M, Milošević J. Measurement of Bs 0 meson production in pp and PbPb collisions at sNN=5.02 TeV. in Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics. 2019;796:168-190.
doi:10.1016/j.physletb.2019.07.014 .

Sirunyan, A. M., Tumasyan, A., Adam, W., Ambrogi, F., Asilar, E, Adžić, Petar, Ćirković, Predrag, Devetak, Damir, Đorđević, Miloš, Milošević, Jovan, "Measurement of Bs 0 meson production in pp and PbPb collisions at sNN=5.02 TeV" in Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 796 (2019):168-190,
https://doi.org/10.1016/j.physletb.2019.07.014 . .

TY  - JOUR
AU  - Sirunyan, A. M.
AU  - Tumasyan, A.
AU  - Adam, W.
AU  - Asilar, E.
AU  - Bergauer, T.
AU  - Adžić, Petar
AU  - Ćirković, Predrag
AU  - Devetak, Damir
AU  - Đorđević, Miloš
AU  - Milošević, Jovan
AU  - Reković, Vladimir
PY  - 2018
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9109
AB  - Events with no charged particles produced between the two leading jets are studied in proton-proton collisions at $$\sqrt{s}=7$$ s=7  $$\,\text {TeV}$$ TeV . The jets were required to have transverse momentum $$p_{\mathrm {T}} ^{\text {jet}}>40$$ pTjet>40  $$\,\text {GeV}$$ GeV  and pseudorapidity $$1.5<|\eta ^{\text {jet}} |<4.7$$ 1.5<|ηjet|<4.7 , and to have values of $$\eta ^{\text {jet}}$$ ηjet  with opposite signs. The data used for this study were collected with the CMS detector during low-luminosity running at the LHC, and correspond to an integrated luminosity of 8$$\,\text {pb}^{-1}$$ pb-1 . Events with no charged particles with $$p_{\mathrm {T}} >0.2$$ pT>0.2  $$\,\text {GeV}$$ GeV  in the interval $$-1<\eta < 1$$ -1<η<1  between the jets are observed in excess of calculations that assume no color-singlet exchange. The fraction of events with such a rapidity gap, amounting to 0.5–1% of the selected dijet sample, is measured as a function of the $$p_{\mathrm {T}}$$ pT  of the second-leading jet and of the rapidity separation between the jets. The data are compared to previous measurements at the Tevatron, and to perturbative quantum chromodynamics calculations based on the Balitsky–Fadin–Kuraev–Lipatov evolution equations, including different models of the non-perturbative gap survival probability.
T2  - European Physical Journal C. Particles and Fields
T1  - Study of dijet events with a large rapidity gap between the two leading jets in pp collisions at √s=7TeV
VL  - 78
IS  - 3
SP  - 242
DO  - 10.1140/epjc/s10052-018-5691-6
ER  - 

@article{
author = "Sirunyan, A. M. and Tumasyan, A. and Adam, W. and Asilar, E. and Bergauer, T. and Adžić, Petar and Ćirković, Predrag and Devetak, Damir and Đorđević, Miloš and Milošević, Jovan and Reković, Vladimir",
year = "2018",
abstract = "Events with no charged particles produced between the two leading jets are studied in proton-proton collisions at $$\sqrt{s}=7$$ s=7  $$\,\text {TeV}$$ TeV . The jets were required to have transverse momentum $$p_{\mathrm {T}} ^{\text {jet}}>40$$ pTjet>40  $$\,\text {GeV}$$ GeV  and pseudorapidity $$1.5<|\eta ^{\text {jet}} |<4.7$$ 1.5<|ηjet|<4.7 , and to have values of $$\eta ^{\text {jet}}$$ ηjet  with opposite signs. The data used for this study were collected with the CMS detector during low-luminosity running at the LHC, and correspond to an integrated luminosity of 8$$\,\text {pb}^{-1}$$ pb-1 . Events with no charged particles with $$p_{\mathrm {T}} >0.2$$ pT>0.2  $$\,\text {GeV}$$ GeV  in the interval $$-1<\eta < 1$$ -1<η<1  between the jets are observed in excess of calculations that assume no color-singlet exchange. The fraction of events with such a rapidity gap, amounting to 0.5–1% of the selected dijet sample, is measured as a function of the $$p_{\mathrm {T}}$$ pT  of the second-leading jet and of the rapidity separation between the jets. The data are compared to previous measurements at the Tevatron, and to perturbative quantum chromodynamics calculations based on the Balitsky–Fadin–Kuraev–Lipatov evolution equations, including different models of the non-perturbative gap survival probability.",
journal = "European Physical Journal C. Particles and Fields",
title = "Study of dijet events with a large rapidity gap between the two leading jets in pp collisions at √s=7TeV",
volume = "78",
number = "3",
pages = "242",
doi = "10.1140/epjc/s10052-018-5691-6"
}

Sirunyan, A. M., Tumasyan, A., Adam, W., Asilar, E., Bergauer, T., Adžić, P., Ćirković, P., Devetak, D., Đorđević, M., Milošević, J.,& Reković, V.. (2018). Study of dijet events with a large rapidity gap between the two leading jets in pp collisions at √s=7TeV. in European Physical Journal C. Particles and Fields, 78(3), 242.
https://doi.org/10.1140/epjc/s10052-018-5691-6

Sirunyan AM, Tumasyan A, Adam W, Asilar E, Bergauer T, Adžić P, Ćirković P, Devetak D, Đorđević M, Milošević J, Reković V. Study of dijet events with a large rapidity gap between the two leading jets in pp collisions at √s=7TeV. in European Physical Journal C. Particles and Fields. 2018;78(3):242.
doi:10.1140/epjc/s10052-018-5691-6 .

Sirunyan, A. M., Tumasyan, A., Adam, W., Asilar, E., Bergauer, T., Adžić, Petar, Ćirković, Predrag, Devetak, Damir, Đorđević, Miloš, Milošević, Jovan, Reković, Vladimir, "Study of dijet events with a large rapidity gap between the two leading jets in pp collisions at √s=7TeV" in European Physical Journal C. Particles and Fields, 78, no. 3 (2018):242,
https://doi.org/10.1140/epjc/s10052-018-5691-6 . .

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  - 2018
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8420
AB  - A search for a new scalar resonance decaying to a pair of Z bosons is performed in the mass range from 130 GeV to 3 TeV, and for various width scenarios. The analysis is based on proton-proton collisions recorded by the CMS experiment at the LHC in 2016, corresponding to an integrated luminosity of 35.9 fb−1 at a center-of-mass energy of 13 TeV. The Z boson pair decays are reconstructed using the 4ℓ, 2ℓ2q, and 2ℓ2ν final states, where ℓ = e or μ. Both gluon fusion and electroweak production of the scalar resonance are considered, with a free parameter describing their relative cross sections. A dedicated categorization of events, based on the kinematic properties of associated jets, and matrix element techniques are employed for an optimal signal and background separation. A description of the interference between signal and background amplitudes for a resonance of an arbitrary width is included. No significant excess of events with respect to the standard model expectation is observed and limits are set on the product of the cross section for a new scalar boson and the branching fraction for its decay to ZZ for a large range of masses and widths.[Figure not available: see fulltext.]. © 2018, The Author(s).
T2  - Journal of High Energy Physics
T1  - Search for a new scalar resonance decaying to a pair of Z bosons in proton-proton collisions at √s=13 TeV
VL  - 2018
IS  - 6
DO  - 10.1007/JHEP06(2018)127
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 = "2018",
abstract = "A search for a new scalar resonance decaying to a pair of Z bosons is performed in the mass range from 130 GeV to 3 TeV, and for various width scenarios. The analysis is based on proton-proton collisions recorded by the CMS experiment at the LHC in 2016, corresponding to an integrated luminosity of 35.9 fb−1 at a center-of-mass energy of 13 TeV. The Z boson pair decays are reconstructed using the 4ℓ, 2ℓ2q, and 2ℓ2ν final states, where ℓ = e or μ. Both gluon fusion and electroweak production of the scalar resonance are considered, with a free parameter describing their relative cross sections. A dedicated categorization of events, based on the kinematic properties of associated jets, and matrix element techniques are employed for an optimal signal and background separation. A description of the interference between signal and background amplitudes for a resonance of an arbitrary width is included. No significant excess of events with respect to the standard model expectation is observed and limits are set on the product of the cross section for a new scalar boson and the branching fraction for its decay to ZZ for a large range of masses and widths.[Figure not available: see fulltext.]. © 2018, The Author(s).",
journal = "Journal of High Energy Physics",
title = "Search for a new scalar resonance decaying to a pair of Z bosons in proton-proton collisions at √s=13 TeV",
volume = "2018",
number = "6",
doi = "10.1007/JHEP06(2018)127"
}

Sirunyan, A. M., Tumasyan, A., Adam, W., Ambrogi, F., Asilar, E., Adžić, P., Ćirković, P., Devetak, D., Đorđević, M.,& Milošević, J.. (2018). Search for a new scalar resonance decaying to a pair of Z bosons in proton-proton collisions at √s=13 TeV. in Journal of High Energy Physics, 2018(6).
https://doi.org/10.1007/JHEP06(2018)127

Sirunyan AM, Tumasyan A, Adam W, Ambrogi F, Asilar E, Adžić P, Ćirković P, Devetak D, Đorđević M, Milošević J. Search for a new scalar resonance decaying to a pair of Z bosons in proton-proton collisions at √s=13 TeV. in Journal of High Energy Physics. 2018;2018(6).
doi:10.1007/JHEP06(2018)127 .

Sirunyan, A. M., Tumasyan, A., Adam, W., Ambrogi, F., Asilar, E, Adžić, Petar, Ćirković, Predrag, Devetak, Damir, Đorđević, Miloš, Milošević, Jovan, "Search for a new scalar resonance decaying to a pair of Z bosons in proton-proton collisions at √s=13 TeV" in Journal of High Energy Physics, 2018, no. 6 (2018),
https://doi.org/10.1007/JHEP06(2018)127 . .