TY  - JOUR
AU  - Sirunyan, A. M.
AU  - Tumasyan, A.
AU  - Adam, W.
AU  - Andrejkovic, J. W.
AU  - Bergauer, T.
AU  - Adžić, Petar
AU  - Đorđević, Miloš
AU  - Milenović, Predrag
AU  - Milošević, Jovan
AU  - Milošević, Vukašin
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9868
AB  - A fiducial cross section for Wγ production in proton-proton collisions is measured at a center-of-mass energy of 13 TeV in 137  fb−1 of data collected using the CMS detector at the LHC. The W→eν and μν decay modes are used in a maximum-likelihood fit to the lepton-photon invariant mass distribution to extract the combined cross section. The measured cross section is compared with theoretical expectations at next-to-leading order in quantum chromodynamics. In addition, 95% confidence level intervals are reported for anomalous triple-gauge couplings within the framework of effective field theory.
T2  - Physical Review Letters
T1  - Measurement of the Wγ Production Cross Section in Proton-Proton Collisions at s=13 TeV and Constraints on Effective Field Theory Coefficients
VL  - 126
SP  - 252002
DO  - 10.1103/PhysRevLett.126.252002
ER  - 

@article{
author = "Sirunyan, A. M. and Tumasyan, A. and Adam, W. and Andrejkovic, J. W. and Bergauer, T. and Adžić, Petar and Đorđević, Miloš and Milenović, Predrag and Milošević, Jovan and Milošević, Vukašin",
year = "2021",
abstract = "A fiducial cross section for Wγ production in proton-proton collisions is measured at a center-of-mass energy of 13 TeV in 137  fb−1 of data collected using the CMS detector at the LHC. The W→eν and μν decay modes are used in a maximum-likelihood fit to the lepton-photon invariant mass distribution to extract the combined cross section. The measured cross section is compared with theoretical expectations at next-to-leading order in quantum chromodynamics. In addition, 95% confidence level intervals are reported for anomalous triple-gauge couplings within the framework of effective field theory.",
journal = "Physical Review Letters",
title = "Measurement of the Wγ Production Cross Section in Proton-Proton Collisions at s=13 TeV and Constraints on Effective Field Theory Coefficients",
volume = "126",
pages = "252002",
doi = "10.1103/PhysRevLett.126.252002"
}

Sirunyan, A. M., Tumasyan, A., Adam, W., Andrejkovic, J. W., Bergauer, T., Adžić, P., Đorđević, M., Milenović, P., Milošević, J.,& Milošević, V.. (2021). Measurement of the Wγ Production Cross Section in Proton-Proton Collisions at s=13 TeV and Constraints on Effective Field Theory Coefficients. in Physical Review Letters, 126, 252002.
https://doi.org/10.1103/PhysRevLett.126.252002

Sirunyan AM, Tumasyan A, Adam W, Andrejkovic J, Bergauer T, Adžić P, Đorđević M, Milenović P, Milošević J, Milošević V. Measurement of the Wγ Production Cross Section in Proton-Proton Collisions at s=13 TeV and Constraints on Effective Field Theory Coefficients. in Physical Review Letters. 2021;126:252002.
doi:10.1103/PhysRevLett.126.252002 .

Sirunyan, A. M., Tumasyan, A., Adam, W., Andrejkovic, J. W., Bergauer, T., Adžić, Petar, Đorđević, Miloš, Milenović, Predrag, Milošević, Jovan, Milošević, Vukašin, "Measurement of the Wγ Production Cross Section in Proton-Proton Collisions at s=13 TeV and Constraints on Effective Field Theory Coefficients" in Physical Review Letters, 126 (2021):252002,
https://doi.org/10.1103/PhysRevLett.126.252002 . .

TY  - JOUR
AU  - Sirunyan, A. M.
AU  - Tumasyan, A.
AU  - Adam, W.
AU  - Andrejkovic, J. W.
AU  - Bergauer, T.
AU  - Adžić, Petar
AU  - Đorđević, Miloš
AU  - Milenović, Predrag
AU  - Milošević, Jovan
AU  - Milošević, Vukašin
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9867
AB  - The Ξb−π+π− invariant mass spectrum is investigated with an event sample of proton-proton collisions at s=13  TeV, collected by the CMS experiment at the LHC in 2016–2018 and corresponding to an integrated luminosity of 140  fb−1. The ground state Ξb− is reconstructed via its decays to J/ψΞ− and J/ψΛK−. A narrow resonance, labeled Ξb(6100)−, is observed at a Ξb−π+π− invariant mass of 6100.3±0.2(stat)±0.1(syst)±0.6(Ξb−)  MeV, where the last uncertainty reflects the precision of the Ξb− baryon mass. The upper limit on the Ξb(6100)− natural width is determined to be 1.9  MeV at 95% confidence level. The low Ξb(6100)− signal yield observed in data does not allow a measurement of the quantum numbers of the new state. However, following analogies with the established excited Ξc baryon states, the new Ξb(6100)− resonance and its decay sequence are consistent with the orbitally excited Ξb− baryon, with spin and parity quantum numbers JP=3/2−.
T2  - Physical Review Letters
T1  - Observation of a New Excited Beauty Strange Baryon Decaying to Ξb−π+π−
VL  - 126
DO  - 10.1103/PhysRevLett.126.252003
ER  - 

@article{
author = "Sirunyan, A. M. and Tumasyan, A. and Adam, W. and Andrejkovic, J. W. and Bergauer, T. and Adžić, Petar and Đorđević, Miloš and Milenović, Predrag and Milošević, Jovan and Milošević, Vukašin",
year = "2021",
abstract = "The Ξb−π+π− invariant mass spectrum is investigated with an event sample of proton-proton collisions at s=13  TeV, collected by the CMS experiment at the LHC in 2016–2018 and corresponding to an integrated luminosity of 140  fb−1. The ground state Ξb− is reconstructed via its decays to J/ψΞ− and J/ψΛK−. A narrow resonance, labeled Ξb(6100)−, is observed at a Ξb−π+π− invariant mass of 6100.3±0.2(stat)±0.1(syst)±0.6(Ξb−)  MeV, where the last uncertainty reflects the precision of the Ξb− baryon mass. The upper limit on the Ξb(6100)− natural width is determined to be 1.9  MeV at 95% confidence level. The low Ξb(6100)− signal yield observed in data does not allow a measurement of the quantum numbers of the new state. However, following analogies with the established excited Ξc baryon states, the new Ξb(6100)− resonance and its decay sequence are consistent with the orbitally excited Ξb− baryon, with spin and parity quantum numbers JP=3/2−.",
journal = "Physical Review Letters",
title = "Observation of a New Excited Beauty Strange Baryon Decaying to Ξb−π+π−",
volume = "126",
doi = "10.1103/PhysRevLett.126.252003"
}

Sirunyan, A. M., Tumasyan, A., Adam, W., Andrejkovic, J. W., Bergauer, T., Adžić, P., Đorđević, M., Milenović, P., Milošević, J.,& Milošević, V.. (2021). Observation of a New Excited Beauty Strange Baryon Decaying to Ξb−π+π−. in Physical Review Letters, 126.
https://doi.org/10.1103/PhysRevLett.126.252003

Sirunyan AM, Tumasyan A, Adam W, Andrejkovic J, Bergauer T, Adžić P, Đorđević M, Milenović P, Milošević J, Milošević V. Observation of a New Excited Beauty Strange Baryon Decaying to Ξb−π+π−. in Physical Review Letters. 2021;126.
doi:10.1103/PhysRevLett.126.252003 .

Sirunyan, A. M., Tumasyan, A., Adam, W., Andrejkovic, J. W., Bergauer, T., Adžić, Petar, Đorđević, Miloš, Milenović, Predrag, Milošević, Jovan, Milošević, Vukašin, "Observation of a New Excited Beauty Strange Baryon Decaying to Ξb−π+π−" in Physical Review Letters, 126 (2021),
https://doi.org/10.1103/PhysRevLett.126.252003 . .

TY  - JOUR
AU  - Sirunyan, A. M.
AU  - Tumasyan, A.
AU  - Adam, W.
AU  - Andrejkovic, J.
AU  - Bergauer, T.
AU  - Adžić, Petar
AU  - Đorđević, Miloš
AU  - Milenović, Predrag
AU  - Milošević, Jovan
AU  - Milošević, Vukašin
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9855
AB  - Production cross sections of the Higgs boson are measured in the  $${\mathrm{H}} \rightarrow {\mathrm{Z}} {\mathrm{Z}} \rightarrow 4\ell $$    H → Z Z → 4 ℓ     ( $$\ell ={\mathrm{e}},{{{\upmu }}_{\mathrm{}}^{\mathrm{}}} $$    ℓ = e ,  μ         ) decay channel. A data sample of proton–proton collisions at a center-of-mass energy of 13 $$\,\text {TeV}$$     TeV    , collected by the CMS detector at the LHC and corresponding to an integrated luminosity of 137 $$\,\text {fb}^{-1}$$      fb  - 1       is used. The signal strength modifier  $$\mu $$   μ   , defined as the ratio of the Higgs boson production rate in the  $$4\ell $$    4 ℓ     channel to the standard model (SM) expectation, is measured to be  $$\mu =0.94 \pm 0.07 \,\text {(stat)} ^{+0.09}_{-0.08} \,\text {(syst)} $$    μ = 0.94 ± 0.07   (stat)  - 0.08   + 0.09    (syst)     at a fixed value of  $$m_{{\mathrm{H}}} = 125.38\,\text {GeV} $$     m H  = 125.38  GeV    . The signal strength modifiers for the individual Higgs boson production modes are also reported. The inclusive fiducial cross section for the  $${\mathrm{H}} \rightarrow 4\ell $$    H → 4 ℓ     process is measured to be  $$2.84^{+0.23}_{-0.22} \,\text {(stat)} ^{+0.26}_{-0.21} \,\text {(syst)} \,\text {fb} $$    2 .  84  - 0.22   + 0.23     (stat)  - 0.21   + 0.26    (syst)  fb    , which is compatible with the SM prediction of  $$2.84 \pm 0.15 \,\text {fb} $$    2.84 ± 0.15  fb     for the same fiducial region. Differential cross sections as a function of the transverse momentum and rapidity of the Higgs boson, the number of associated jets, and the transverse momentum of the leading associated jet are measured. A new set of cross section measurements in mutually exclusive categories targeted to identify production mechanisms and kinematical features of the events is presented. The results are in agreement with the SM predictions.
T2  - European Physical Journal C. Particles and Fields
T1  - Measurements of production cross sections of the Higgs boson in the four-lepton final state in proton–proton collisions at √s=13Te
VL  - 81
IS  - 6
SP  - 488
DO  - 10.1140/epjc/s10052-021-09200-x
ER  - 

@article{
author = "Sirunyan, A. M. and Tumasyan, A. and Adam, W. and Andrejkovic, J. and Bergauer, T. and Adžić, Petar and Đorđević, Miloš and Milenović, Predrag and Milošević, Jovan and Milošević, Vukašin",
year = "2021",
abstract = "Production cross sections of the Higgs boson are measured in the  $${\mathrm{H}} \rightarrow {\mathrm{Z}} {\mathrm{Z}} \rightarrow 4\ell $$    H → Z Z → 4 ℓ     ( $$\ell ={\mathrm{e}},{{{\upmu }}_{\mathrm{}}^{\mathrm{}}} $$    ℓ = e ,  μ         ) decay channel. A data sample of proton–proton collisions at a center-of-mass energy of 13 $$\,\text {TeV}$$     TeV    , collected by the CMS detector at the LHC and corresponding to an integrated luminosity of 137 $$\,\text {fb}^{-1}$$      fb  - 1       is used. The signal strength modifier  $$\mu $$   μ   , defined as the ratio of the Higgs boson production rate in the  $$4\ell $$    4 ℓ     channel to the standard model (SM) expectation, is measured to be  $$\mu =0.94 \pm 0.07 \,\text {(stat)} ^{+0.09}_{-0.08} \,\text {(syst)} $$    μ = 0.94 ± 0.07   (stat)  - 0.08   + 0.09    (syst)     at a fixed value of  $$m_{{\mathrm{H}}} = 125.38\,\text {GeV} $$     m H  = 125.38  GeV    . The signal strength modifiers for the individual Higgs boson production modes are also reported. The inclusive fiducial cross section for the  $${\mathrm{H}} \rightarrow 4\ell $$    H → 4 ℓ     process is measured to be  $$2.84^{+0.23}_{-0.22} \,\text {(stat)} ^{+0.26}_{-0.21} \,\text {(syst)} \,\text {fb} $$    2 .  84  - 0.22   + 0.23     (stat)  - 0.21   + 0.26    (syst)  fb    , which is compatible with the SM prediction of  $$2.84 \pm 0.15 \,\text {fb} $$    2.84 ± 0.15  fb     for the same fiducial region. Differential cross sections as a function of the transverse momentum and rapidity of the Higgs boson, the number of associated jets, and the transverse momentum of the leading associated jet are measured. A new set of cross section measurements in mutually exclusive categories targeted to identify production mechanisms and kinematical features of the events is presented. The results are in agreement with the SM predictions.",
journal = "European Physical Journal C. Particles and Fields",
title = "Measurements of production cross sections of the Higgs boson in the four-lepton final state in proton–proton collisions at √s=13Te",
volume = "81",
number = "6",
pages = "488",
doi = "10.1140/epjc/s10052-021-09200-x"
}

Sirunyan, A. M., Tumasyan, A., Adam, W., Andrejkovic, J., Bergauer, T., Adžić, P., Đorđević, M., Milenović, P., Milošević, J.,& Milošević, V.. (2021). Measurements of production cross sections of the Higgs boson in the four-lepton final state in proton–proton collisions at √s=13Te. in European Physical Journal C. Particles and Fields, 81(6), 488.
https://doi.org/10.1140/epjc/s10052-021-09200-x

Sirunyan AM, Tumasyan A, Adam W, Andrejkovic J, Bergauer T, Adžić P, Đorđević M, Milenović P, Milošević J, Milošević V. Measurements of production cross sections of the Higgs boson in the four-lepton final state in proton–proton collisions at √s=13Te. in European Physical Journal C. Particles and Fields. 2021;81(6):488.
doi:10.1140/epjc/s10052-021-09200-x .

Sirunyan, A. M., Tumasyan, A., Adam, W., Andrejkovic, J., Bergauer, T., Adžić, Petar, Đorđević, Miloš, Milenović, Predrag, Milošević, Jovan, Milošević, Vukašin, "Measurements of production cross sections of the Higgs boson in the four-lepton final state in proton–proton collisions at √s=13Te" in European Physical Journal C. Particles and Fields, 81, no. 6 (2021):488,
https://doi.org/10.1140/epjc/s10052-021-09200-x . .

TY  - JOUR
AU  - Sirunyan, A M
AU  - Tumasyan, A.
AU  - Adam, W
AU  - Andrejkovic, J W
AU  - Bergauer, T.
AU  - Adžić, Petar
AU  - Đorđević, Miloš
AU  - Milenović, Predrag
AU  - Milošević, Jovan
AU  - Milošević, Vukašin
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/10163
AB  - The measurement of the luminosity recorded by the CMS detector installed at LHC interaction point 5, using proton–proton collisions at s=13TeV in 2015 and 2016, is reported. The absolute luminosity scale is measured for individual bunch crossings using beam-separation scans (the van der Meer method), with a relative precision of 1.3 and 1.0% in 2015 and 2016, respectively. The dominant sources of uncertainty are related to residual differences between the measured beam positions and the ones provided by the operational settings of the LHC magnets, the factorizability of the proton bunch spatial density functions in the coordinates transverse to the beam direction, and the modeling of the effect of electromagnetic interactions among protons in the colliding bunches. When applying the van der Meer calibration to the entire run periods, the integrated luminosities when CMS was fully operational are 2.27 and 36.3 fb-1 in 2015 and 2016, with a relative precision of 1.6 and 1.2%, respectively. These are among the most precise luminosity measurements at bunched-beam hadron colliders.
T2  - European Physical Journal C. Particles and Fields
T1  - Precision luminosity measurement in proton–proton collisions at √s=13TeV in 2015 and 2016 at CMS
VL  - 81
IS  - 9
SP  - 800
DO  - 10.1140/epjc/s10052-021-09538-2
ER  - 

@article{
author = "Sirunyan, A M and Tumasyan, A. and Adam, W and Andrejkovic, J W and Bergauer, T. and Adžić, Petar and Đorđević, Miloš and Milenović, Predrag and Milošević, Jovan and Milošević, Vukašin",
year = "2021",
abstract = "The measurement of the luminosity recorded by the CMS detector installed at LHC interaction point 5, using proton–proton collisions at s=13TeV in 2015 and 2016, is reported. The absolute luminosity scale is measured for individual bunch crossings using beam-separation scans (the van der Meer method), with a relative precision of 1.3 and 1.0% in 2015 and 2016, respectively. The dominant sources of uncertainty are related to residual differences between the measured beam positions and the ones provided by the operational settings of the LHC magnets, the factorizability of the proton bunch spatial density functions in the coordinates transverse to the beam direction, and the modeling of the effect of electromagnetic interactions among protons in the colliding bunches. When applying the van der Meer calibration to the entire run periods, the integrated luminosities when CMS was fully operational are 2.27 and 36.3 fb-1 in 2015 and 2016, with a relative precision of 1.6 and 1.2%, respectively. These are among the most precise luminosity measurements at bunched-beam hadron colliders.",
journal = "European Physical Journal C. Particles and Fields",
title = "Precision luminosity measurement in proton–proton collisions at √s=13TeV in 2015 and 2016 at CMS",
volume = "81",
number = "9",
pages = "800",
doi = "10.1140/epjc/s10052-021-09538-2"
}

Sirunyan, A. M., Tumasyan, A., Adam, W., Andrejkovic, J. W., Bergauer, T., Adžić, P., Đorđević, M., Milenović, P., Milošević, J.,& Milošević, V.. (2021). Precision luminosity measurement in proton–proton collisions at √s=13TeV in 2015 and 2016 at CMS. in European Physical Journal C. Particles and Fields, 81(9), 800.
https://doi.org/10.1140/epjc/s10052-021-09538-2

Sirunyan AM, Tumasyan A, Adam W, Andrejkovic JW, Bergauer T, Adžić P, Đorđević M, Milenović P, Milošević J, Milošević V. Precision luminosity measurement in proton–proton collisions at √s=13TeV in 2015 and 2016 at CMS. in European Physical Journal C. Particles and Fields. 2021;81(9):800.
doi:10.1140/epjc/s10052-021-09538-2 .

Sirunyan, A M, Tumasyan, A., Adam, W, Andrejkovic, J W, Bergauer, T., Adžić, Petar, Đorđević, Miloš, Milenović, Predrag, Milošević, Jovan, Milošević, Vukašin, "Precision luminosity measurement in proton–proton collisions at √s=13TeV in 2015 and 2016 at CMS" in European Physical Journal C. Particles and Fields, 81, no. 9 (2021):800,
https://doi.org/10.1140/epjc/s10052-021-09538-2 . .

TY  - JOUR
AU  - Sirunyan, A. M.
AU  - Tumasyan, A.
AU  - Adam, W.
AU  - Andrejkovic, J. W.
AU  - Bergauer, T.
AU  - Adžić, Petar
AU  - Đorđević, Miloš
AU  - Milenović, Predrag
AU  - Milošević, Jovan
AU  - Milošević, Vukašin
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/10044
AB  - A search for production of the supersymmetric partners of the top quark, top squarks, is presented. The search is based on proton-proton collision events containing multiple jets, no leptons, and large transverse momentum imbalance. The data were collected with the CMS detector at the CERN LHC at a center-of-mass energy of 13 TeV, and correspond to an integrated luminosity of 137  fb−1. The targeted signal production scenarios are direct and gluino-mediated top squark production, including scenarios in which the top squark and neutralino masses are nearly degenerate. The search utilizes novel algorithms based on deep neural networks that identify hadronically decaying top quarks and W bosons, which are expected in many of the targeted signal models. No statistically significant excess of events is observed relative to the expectation from the standard model, and limits on the top squark production cross section are obtained in the context of simplified supersymmetric models for various production and decay modes. Exclusion limits as high as 1310 GeV are established at the 95% confidence level on the mass of the top squark for direct top squark production models, and as high as 2260 GeV on the mass of the gluino for gluino-mediated top squark production models. These results represent a significant improvement over the results of previous searches for supersymmetry by CMS in the same final state.
T2  - Physical Review D
T1  - Search for top squark production in fully hadronic final states in proton-proton collisions at s=13  TeV
VL  - 104
SP  - 052001
DO  - 10.1103/PhysRevD.104.052001
ER  - 

@article{
author = "Sirunyan, A. M. and Tumasyan, A. and Adam, W. and Andrejkovic, J. W. and Bergauer, T. and Adžić, Petar and Đorđević, Miloš and Milenović, Predrag and Milošević, Jovan and Milošević, Vukašin",
year = "2021",
abstract = "A search for production of the supersymmetric partners of the top quark, top squarks, is presented. The search is based on proton-proton collision events containing multiple jets, no leptons, and large transverse momentum imbalance. The data were collected with the CMS detector at the CERN LHC at a center-of-mass energy of 13 TeV, and correspond to an integrated luminosity of 137  fb−1. The targeted signal production scenarios are direct and gluino-mediated top squark production, including scenarios in which the top squark and neutralino masses are nearly degenerate. The search utilizes novel algorithms based on deep neural networks that identify hadronically decaying top quarks and W bosons, which are expected in many of the targeted signal models. No statistically significant excess of events is observed relative to the expectation from the standard model, and limits on the top squark production cross section are obtained in the context of simplified supersymmetric models for various production and decay modes. Exclusion limits as high as 1310 GeV are established at the 95% confidence level on the mass of the top squark for direct top squark production models, and as high as 2260 GeV on the mass of the gluino for gluino-mediated top squark production models. These results represent a significant improvement over the results of previous searches for supersymmetry by CMS in the same final state.",
journal = "Physical Review D",
title = "Search for top squark production in fully hadronic final states in proton-proton collisions at s=13  TeV",
volume = "104",
pages = "052001",
doi = "10.1103/PhysRevD.104.052001"
}

Sirunyan, A. M., Tumasyan, A., Adam, W., Andrejkovic, J. W., Bergauer, T., Adžić, P., Đorđević, M., Milenović, P., Milošević, J.,& Milošević, V.. (2021). Search for top squark production in fully hadronic final states in proton-proton collisions at s=13  TeV. in Physical Review D, 104, 052001.
https://doi.org/10.1103/PhysRevD.104.052001

Sirunyan A, Tumasyan A, Adam W, Andrejkovic J, Bergauer T, Adžić P, Đorđević M, Milenović P, Milošević J, Milošević V. Search for top squark production in fully hadronic final states in proton-proton collisions at s=13  TeV. in Physical Review D. 2021;104:052001.
doi:10.1103/PhysRevD.104.052001 .

Sirunyan, A. M., Tumasyan, A., Adam, W., Andrejkovic, J. W., Bergauer, T., Adžić, Petar, Đorđević, Miloš, Milenović, Predrag, Milošević, Jovan, Milošević, Vukašin, "Search for top squark production in fully hadronic final states in proton-proton collisions at s=13  TeV" in Physical Review D, 104 (2021):052001,
https://doi.org/10.1103/PhysRevD.104.052001 . .

TY  - JOUR
AU  - Sirunyan, A. M.
AU  - Tumasyan, A.
AU  - Adam, W.
AU  - Andrejkovic, J. W.
AU  - Bergauer, T.
AU  - Adžić, Petar
AU  - Đorđević, Miloš
AU  - Milenović, Predrag
AU  - Milošević, Jovan
AU  - Milošević, Vukašin
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/10042
AB  - Many new physics models, including versions of supersymmetry characterized by R-parity violation (RPV), compressed mass spectra, long decay chains, or additional hidden sectors, predict the production of events with top quarks, low missing transverse momentum, and many additional quarks or gluons. The results of a search for new physics in events with two top quarks and additional jets are reported. The search is performed using events with at least seven jets and exactly one electron or muon. No requirement on missing transverse momentum is imposed. The study is based on a sample of proton-proton collisions at s=13TeV corresponding to 137  fb−1 of integrated luminosity collected with the CMS detector at the LHC in 2016–2018. The data are used to determine best fit values and upper limits on the cross section for pair production of top squarks in scenarios of RPV and stealth supersymmetry. Top squark masses up to 670 (870)  GeV are excluded at 95% confidence level for the RPV (stealth) scenario, and the maximum observed local signal significance is 2.8 standard deviations for the RPV scenario with top squark mass of 400  GeV.
T2  - Physical Review D
T1  - Search for top squarks in final states with two top quarks and several light-flavor jets in proton-proton collisions at s =13 TeV
VL  - 104
SP  - 032006
DO  - 10.1103/PhysRevD.104.032006
ER  - 

@article{
author = "Sirunyan, A. M. and Tumasyan, A. and Adam, W. and Andrejkovic, J. W. and Bergauer, T. and Adžić, Petar and Đorđević, Miloš and Milenović, Predrag and Milošević, Jovan and Milošević, Vukašin",
year = "2021",
abstract = "Many new physics models, including versions of supersymmetry characterized by R-parity violation (RPV), compressed mass spectra, long decay chains, or additional hidden sectors, predict the production of events with top quarks, low missing transverse momentum, and many additional quarks or gluons. The results of a search for new physics in events with two top quarks and additional jets are reported. The search is performed using events with at least seven jets and exactly one electron or muon. No requirement on missing transverse momentum is imposed. The study is based on a sample of proton-proton collisions at s=13TeV corresponding to 137  fb−1 of integrated luminosity collected with the CMS detector at the LHC in 2016–2018. The data are used to determine best fit values and upper limits on the cross section for pair production of top squarks in scenarios of RPV and stealth supersymmetry. Top squark masses up to 670 (870)  GeV are excluded at 95% confidence level for the RPV (stealth) scenario, and the maximum observed local signal significance is 2.8 standard deviations for the RPV scenario with top squark mass of 400  GeV.",
journal = "Physical Review D",
title = "Search for top squarks in final states with two top quarks and several light-flavor jets in proton-proton collisions at s =13 TeV",
volume = "104",
pages = "032006",
doi = "10.1103/PhysRevD.104.032006"
}

Sirunyan, A. M., Tumasyan, A., Adam, W., Andrejkovic, J. W., Bergauer, T., Adžić, P., Đorđević, M., Milenović, P., Milošević, J.,& Milošević, V.. (2021). Search for top squarks in final states with two top quarks and several light-flavor jets in proton-proton collisions at s =13 TeV. in Physical Review D, 104, 032006.
https://doi.org/10.1103/PhysRevD.104.032006

Sirunyan A, Tumasyan A, Adam W, Andrejkovic J, Bergauer T, Adžić P, Đorđević M, Milenović P, Milošević J, Milošević V. Search for top squarks in final states with two top quarks and several light-flavor jets in proton-proton collisions at s =13 TeV. in Physical Review D. 2021;104:032006.
doi:10.1103/PhysRevD.104.032006 .

Sirunyan, A. M., Tumasyan, A., Adam, W., Andrejkovic, J. W., Bergauer, T., Adžić, Petar, Đorđević, Miloš, Milenović, Predrag, Milošević, Jovan, Milošević, Vukašin, "Search for top squarks in final states with two top quarks and several light-flavor jets in proton-proton collisions at s =13 TeV" in Physical Review D, 104 (2021):032006,
https://doi.org/10.1103/PhysRevD.104.032006 . .

TY  - JOUR
AU  - Sirunyan, A.
AU  - Tumasyan, A.
AU  - Adam, W.
AU  - Andrejkovic, J.
AU  - Bergauer, T.
AU  - Adžić, Petar
AU  - Đorđević, Miloš
AU  - Milenović, Predrag
AU  - Milošević, Jovan
AU  - Milošević, Vukašin
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/10028
AB  - A search is presented for physics beyond the standard model (SM) using electron or muon pairs with high invariant mass. A data set of proton-proton collisions collected by the CMS experiment at the LHC at     s    $$ \sqrt{s} $$  = 13 TeV from 2016 to 2018 corresponding to a total integrated luminosity of up to 140 fb −1 is analyzed. No significant deviation is observed with respect to the SM background expectations. Upper limits are presented on the ratio of the product of the production cross section and the branching fraction to dileptons of a new narrow resonance to that of the Z boson. These provide the most stringent lower limits to date on the masses for various spin-1 particles, spin-2 gravitons in the Randall-Sundrum model, as well as spin-1 mediators between the SM and dark matter particles. Lower limits on the ultraviolet cutoff parameter are set both for four-fermion contact interactions and for the Arkani-Hamed, Dimopoulos, and Dvali model with large extra dimensions. Lepton flavor universality is tested at the TeV scale for the first time by comparing the dimuon and dielectron mass spectra. No significant deviation from the SM expectation of unity is observed.
T2  - Journal of High Energy Physics
T1  - Search for resonant and nonresonant new phenomena in high-mass dilepton final states at √s = 13 TeV
VL  - 2021
IS  - 7
SP  - 208
DO  - 10.1007/JHEP07(2021)208
ER  - 

@article{
author = "Sirunyan, A. and Tumasyan, A. and Adam, W. and Andrejkovic, J. and Bergauer, T. and Adžić, Petar and Đorđević, Miloš and Milenović, Predrag and Milošević, Jovan and Milošević, Vukašin",
year = "2021",
abstract = "A search is presented for physics beyond the standard model (SM) using electron or muon pairs with high invariant mass. A data set of proton-proton collisions collected by the CMS experiment at the LHC at     s    $$ \sqrt{s} $$  = 13 TeV from 2016 to 2018 corresponding to a total integrated luminosity of up to 140 fb −1 is analyzed. No significant deviation is observed with respect to the SM background expectations. Upper limits are presented on the ratio of the product of the production cross section and the branching fraction to dileptons of a new narrow resonance to that of the Z boson. These provide the most stringent lower limits to date on the masses for various spin-1 particles, spin-2 gravitons in the Randall-Sundrum model, as well as spin-1 mediators between the SM and dark matter particles. Lower limits on the ultraviolet cutoff parameter are set both for four-fermion contact interactions and for the Arkani-Hamed, Dimopoulos, and Dvali model with large extra dimensions. Lepton flavor universality is tested at the TeV scale for the first time by comparing the dimuon and dielectron mass spectra. No significant deviation from the SM expectation of unity is observed.",
journal = "Journal of High Energy Physics",
title = "Search for resonant and nonresonant new phenomena in high-mass dilepton final states at √s = 13 TeV",
volume = "2021",
number = "7",
pages = "208",
doi = "10.1007/JHEP07(2021)208"
}

Sirunyan, A., Tumasyan, A., Adam, W., Andrejkovic, J., Bergauer, T., Adžić, P., Đorđević, M., Milenović, P., Milošević, J.,& Milošević, V.. (2021). Search for resonant and nonresonant new phenomena in high-mass dilepton final states at √s = 13 TeV. in Journal of High Energy Physics, 2021(7), 208.
https://doi.org/10.1007/JHEP07(2021)208

Sirunyan A, Tumasyan A, Adam W, Andrejkovic J, Bergauer T, Adžić P, Đorđević M, Milenović P, Milošević J, Milošević V. Search for resonant and nonresonant new phenomena in high-mass dilepton final states at √s = 13 TeV. in Journal of High Energy Physics. 2021;2021(7):208.
doi:10.1007/JHEP07(2021)208 .

Sirunyan, A., Tumasyan, A., Adam, W., Andrejkovic, J., Bergauer, T., Adžić, Petar, Đorđević, Miloš, Milenović, Predrag, Milošević, Jovan, Milošević, Vukašin, "Search for resonant and nonresonant new phenomena in high-mass dilepton final states at √s = 13 TeV" in Journal of High Energy Physics, 2021, no. 7 (2021):208,
https://doi.org/10.1007/JHEP07(2021)208 . .

TY  - JOUR
AU  - Sirunyan, A. M.
AU  - Tumasyan, A.
AU  - Adam, W.
AU  - Andrejkovic, J.W.
AU  - Bergauer, T.
AU  - Adžić, Petar
AU  - Đorđević, Miloš
AU  - Milenović, Predrag
AU  - Milošević, Jovan
AU  - Milošević, Vukašin
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/10024
AB  - A search is performed for W′ bosons decaying to a top and a bottom quark in the all-hadronic final state, in proton-proton collisions at a center-of-mass energy of 13TeV. The analyzed data were collected by the CMS experiment between 2016 and 2018 and correspond to an integrated luminosity of 137fb−1. Deep neural network algorithms are used to identify the jet initiated by the bottom quark and the jet containing the decay products of the top quark when the W boson from the top quark decays hadronically. No excess above the estimated standard model background is observed. Upper limits on the production cross sections of W′ bosons decaying to a top and a bottom quark are set. Both left- and right-handed W′ bosons with masses below 3.4TeV are excluded at 95% confidence level, and the most stringent limits to date on W′ bosons decaying to a top and a bottom quark in the all-hadronic final state are obtained.
T2  - Physics Letters B
T1  - Search for W′ bosons decaying to a top and a bottom quark at s=13TeV in the hadronic final state
VL  - 820 C
SP  - 136535
DO  - 10.1016/j.physletb.2021.136535
ER  - 

@article{
author = "Sirunyan, A. M. and Tumasyan, A. and Adam, W. and Andrejkovic, J.W. and Bergauer, T. and Adžić, Petar and Đorđević, Miloš and Milenović, Predrag and Milošević, Jovan and Milošević, Vukašin",
year = "2021",
abstract = "A search is performed for W′ bosons decaying to a top and a bottom quark in the all-hadronic final state, in proton-proton collisions at a center-of-mass energy of 13TeV. The analyzed data were collected by the CMS experiment between 2016 and 2018 and correspond to an integrated luminosity of 137fb−1. Deep neural network algorithms are used to identify the jet initiated by the bottom quark and the jet containing the decay products of the top quark when the W boson from the top quark decays hadronically. No excess above the estimated standard model background is observed. Upper limits on the production cross sections of W′ bosons decaying to a top and a bottom quark are set. Both left- and right-handed W′ bosons with masses below 3.4TeV are excluded at 95% confidence level, and the most stringent limits to date on W′ bosons decaying to a top and a bottom quark in the all-hadronic final state are obtained.",
journal = "Physics Letters B",
title = "Search for W′ bosons decaying to a top and a bottom quark at s=13TeV in the hadronic final state",
volume = "820 C",
pages = "136535",
doi = "10.1016/j.physletb.2021.136535"
}

Sirunyan, A. M., Tumasyan, A., Adam, W., Andrejkovic, J.W., Bergauer, T., Adžić, P., Đorđević, M., Milenović, P., Milošević, J.,& Milošević, V.. (2021). Search for W′ bosons decaying to a top and a bottom quark at s=13TeV in the hadronic final state. in Physics Letters B, 820 C, 136535.
https://doi.org/10.1016/j.physletb.2021.136535

Sirunyan AM, Tumasyan A, Adam W, Andrejkovic J, Bergauer T, Adžić P, Đorđević M, Milenović P, Milošević J, Milošević V. Search for W′ bosons decaying to a top and a bottom quark at s=13TeV in the hadronic final state. in Physics Letters B. 2021;820 C:136535.
doi:10.1016/j.physletb.2021.136535 .

Sirunyan, A. M., Tumasyan, A., Adam, W., Andrejkovic, J.W., Bergauer, T., Adžić, Petar, Đorđević, Miloš, Milenović, Predrag, Milošević, Jovan, Milošević, Vukašin, "Search for W′ bosons decaying to a top and a bottom quark at s=13TeV in the hadronic final state" in Physics Letters B, 820 C (2021):136535,
https://doi.org/10.1016/j.physletb.2021.136535 . .