TY  - JOUR
AU  - Khachatryan, V.
AU  - Adžić, Petar
AU  - Ćirković, Predrag
AU  - Devetak, Damir
AU  - Đorđević, Miloš
AU  - Milošević, Jovan
AU  - Reković, Vladimir
AU  - Milenović, Predrag
PY  - 2017
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/1419
AB  - Measurements of two- and multi-particle angular correlations in pp collisions at root s = 5, 7, and 13TeV are presented as a function of charged-particle multiplicity. The data, corresponding to integrated luminosities of 1.0 pb(-1) (5 TeV), 6.2 pb(-1) (7 TeV), and 0.7 pb(-1) (13 TeV), were collected using the CMS detector at the LHC. The second-order (v(2)) and third-order (v(3)) azimuthal anisotropy harmonics of unidentified charged particles, as well as v(2) of K-S(0) and Lambda/(Lambda) over bar particles, are extracted from long-range two-particle correlations as functions of particle multiplicity and transverse momentum. For high-multiplicity pp events, a mass ordering is observed for the v(2) values of charged hadrons (mostly pions), K-S(0), and Lambda/(Lambda) over bar, with lighter particle species exhibiting a stronger azimuthal anisotropy signal below pT approximate to GeV/c. For 13 TeV data, the v(2) signals are also extracted from four- and six-particle correlations for the first time in pp collisions, with comparable magnitude to those from two-particle correlations. These observations are similar to those seen in pPb and PbPb collisions, and support the interpretation of a collective origin for the observed long-range correlations in high-multiplicity pp collisions. (C) 2016 The Author. Published by Elsevier B.V. This is an open access article under the CC BY license.
T2  - Physics Letters B
T1  - Evidence for collectivity in pp collisions at the LHC
VL  - 765
SP  - 193
EP  - 220
DO  - 10.1016/j.physletb.2016.12.009
ER  - 

@article{
author = "Khachatryan, V. and Adžić, Petar and Ćirković, Predrag and Devetak, Damir and Đorđević, Miloš and Milošević, Jovan and Reković, Vladimir and Milenović, Predrag",
year = "2017",
abstract = "Measurements of two- and multi-particle angular correlations in pp collisions at root s = 5, 7, and 13TeV are presented as a function of charged-particle multiplicity. The data, corresponding to integrated luminosities of 1.0 pb(-1) (5 TeV), 6.2 pb(-1) (7 TeV), and 0.7 pb(-1) (13 TeV), were collected using the CMS detector at the LHC. The second-order (v(2)) and third-order (v(3)) azimuthal anisotropy harmonics of unidentified charged particles, as well as v(2) of K-S(0) and Lambda/(Lambda) over bar particles, are extracted from long-range two-particle correlations as functions of particle multiplicity and transverse momentum. For high-multiplicity pp events, a mass ordering is observed for the v(2) values of charged hadrons (mostly pions), K-S(0), and Lambda/(Lambda) over bar, with lighter particle species exhibiting a stronger azimuthal anisotropy signal below pT approximate to GeV/c. For 13 TeV data, the v(2) signals are also extracted from four- and six-particle correlations for the first time in pp collisions, with comparable magnitude to those from two-particle correlations. These observations are similar to those seen in pPb and PbPb collisions, and support the interpretation of a collective origin for the observed long-range correlations in high-multiplicity pp collisions. (C) 2016 The Author. Published by Elsevier B.V. This is an open access article under the CC BY license.",
journal = "Physics Letters B",
title = "Evidence for collectivity in pp collisions at the LHC",
volume = "765",
pages = "193-220",
doi = "10.1016/j.physletb.2016.12.009"
}

Khachatryan, V., Adžić, P., Ćirković, P., Devetak, D., Đorđević, M., Milošević, J., Reković, V.,& Milenović, P.. (2017). Evidence for collectivity in pp collisions at the LHC. in Physics Letters B, 765, 193-220.
https://doi.org/10.1016/j.physletb.2016.12.009

Khachatryan V, Adžić P, Ćirković P, Devetak D, Đorđević M, Milošević J, Reković V, Milenović P. Evidence for collectivity in pp collisions at the LHC. in Physics Letters B. 2017;765:193-220.
doi:10.1016/j.physletb.2016.12.009 .

Khachatryan, V., Adžić, Petar, Ćirković, Predrag, Devetak, Damir, Đorđević, Miloš, Milošević, Jovan, Reković, Vladimir, Milenović, Predrag, "Evidence for collectivity in pp collisions at the LHC" in Physics Letters B, 765 (2017):193-220,
https://doi.org/10.1016/j.physletb.2016.12.009 . .

TY  - JOUR
AU  - Khachatryan, V.
AU  - Adžić, Petar
AU  - Milošević, Jovan
AU  - Reković, Vladimir
AU  - Đorđević, Miloš
AU  - Milenović, Predrag
PY  - 2017
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/1389
AB  - A measurement of the top quark pair production () cross section in proton-proton collisions at the centre-of-mass energy of 8 is presented using data collected with the CMS detector at the LHC, corresponding to an integrated luminosity of 19.6. This analysis is performed in the decay channels with one isolated, high transverse momentum electron or muon and at least four jets, at least one of which is required to be identified as originating from hadronization of a b quark. The calibration of the jet energy scale and the efficiency of b jet identification are determined from data. The measured cross section is . This measurement is compared with an analysis of 7 data, corresponding to an integrated luminosity of 5.0, to determine the ratio of 8 to 7 cross sections, which is found to be . The measurements are in agreement with QCD predictions up to next-to-next-to-leading order.
T2  - European Physical Journal C. Particles and Fields
T1  - Measurements of the t(t)over-bar production cross section in lepton plus jets final states in pp collisions at 8 and ratio of 8 to 7 cross sections
VL  - 77
IS  - 1
SP  - 1
EP  - 27
DO  - 10.1140/epjc/s10052-016-4504-z
ER  - 

@article{
author = "Khachatryan, V. and Adžić, Petar and Milošević, Jovan and Reković, Vladimir and Đorđević, Miloš and Milenović, Predrag",
year = "2017",
abstract = "A measurement of the top quark pair production () cross section in proton-proton collisions at the centre-of-mass energy of 8 is presented using data collected with the CMS detector at the LHC, corresponding to an integrated luminosity of 19.6. This analysis is performed in the decay channels with one isolated, high transverse momentum electron or muon and at least four jets, at least one of which is required to be identified as originating from hadronization of a b quark. The calibration of the jet energy scale and the efficiency of b jet identification are determined from data. The measured cross section is . This measurement is compared with an analysis of 7 data, corresponding to an integrated luminosity of 5.0, to determine the ratio of 8 to 7 cross sections, which is found to be . The measurements are in agreement with QCD predictions up to next-to-next-to-leading order.",
journal = "European Physical Journal C. Particles and Fields",
title = "Measurements of the t(t)over-bar production cross section in lepton plus jets final states in pp collisions at 8 and ratio of 8 to 7 cross sections",
volume = "77",
number = "1",
pages = "1-27",
doi = "10.1140/epjc/s10052-016-4504-z"
}

Khachatryan, V., Adžić, P., Milošević, J., Reković, V., Đorđević, M.,& Milenović, P.. (2017). Measurements of the t(t)over-bar production cross section in lepton plus jets final states in pp collisions at 8 and ratio of 8 to 7 cross sections. in European Physical Journal C. Particles and Fields, 77(1), 1-27.
https://doi.org/10.1140/epjc/s10052-016-4504-z

Khachatryan V, Adžić P, Milošević J, Reković V, Đorđević M, Milenović P. Measurements of the t(t)over-bar production cross section in lepton plus jets final states in pp collisions at 8 and ratio of 8 to 7 cross sections. in European Physical Journal C. Particles and Fields. 2017;77(1):1-27.
doi:10.1140/epjc/s10052-016-4504-z .

Khachatryan, V., Adžić, Petar, Milošević, Jovan, Reković, Vladimir, Đorđević, Miloš, Milenović, Predrag, "Measurements of the t(t)over-bar production cross section in lepton plus jets final states in pp collisions at 8 and ratio of 8 to 7 cross sections" in European Physical Journal C. Particles and Fields, 77, no. 1 (2017):1-27,
https://doi.org/10.1140/epjc/s10052-016-4504-z . .

TY  - JOUR
AU  - Khachatryan, V.
AU  - Adžić, Petar
AU  - Ćirković, Predrag
AU  - Devetak, Damir
AU  - Milošević, Jovan
AU  - Reković, Vladimir
AU  - Đorđević, Miloš
AU  - Milenović, Predrag
PY  - 2017
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/1386
AB  - A first search for pair production of dark matter candidates through vector boson fusion in proton-proton collisions at root s = 8 TeV is performed with the CMS detector. The vector boson fusion topology enhances missing transverse momentum, providing a way to probe supersymmetry, even in the case of a compressed mass spectrum. The data sample corresponds to an integrated luminosity of 18.5 fb(-1), recorded by the CMS experiment. The observed dijet mass spectrum is consistent with the standard model expectation. In an effective field theory, dark matter masses are explored as a function of contact interaction strength. The most stringent limit on bottom squark production with mass below 315 GeV is also reported, assuming a 5 GeV mass difference with respect to the lightest neutralino.
T2  - Physical Review Letters
T1  - Search for Dark Matter and Supersymmetry with a Compressed Mass Spectrum in the Vector Boson Fusion Topology in Proton-Proton Collisions at root s=8 TeV
VL  - 118
IS  - 2
DO  - 10.1103/PhysRevLett.118.021802
ER  - 

@article{
author = "Khachatryan, V. and Adžić, Petar and Ćirković, Predrag and Devetak, Damir and Milošević, Jovan and Reković, Vladimir and Đorđević, Miloš and Milenović, Predrag",
year = "2017",
abstract = "A first search for pair production of dark matter candidates through vector boson fusion in proton-proton collisions at root s = 8 TeV is performed with the CMS detector. The vector boson fusion topology enhances missing transverse momentum, providing a way to probe supersymmetry, even in the case of a compressed mass spectrum. The data sample corresponds to an integrated luminosity of 18.5 fb(-1), recorded by the CMS experiment. The observed dijet mass spectrum is consistent with the standard model expectation. In an effective field theory, dark matter masses are explored as a function of contact interaction strength. The most stringent limit on bottom squark production with mass below 315 GeV is also reported, assuming a 5 GeV mass difference with respect to the lightest neutralino.",
journal = "Physical Review Letters",
title = "Search for Dark Matter and Supersymmetry with a Compressed Mass Spectrum in the Vector Boson Fusion Topology in Proton-Proton Collisions at root s=8 TeV",
volume = "118",
number = "2",
doi = "10.1103/PhysRevLett.118.021802"
}

Khachatryan, V., Adžić, P., Ćirković, P., Devetak, D., Milošević, J., Reković, V., Đorđević, M.,& Milenović, P.. (2017). Search for Dark Matter and Supersymmetry with a Compressed Mass Spectrum in the Vector Boson Fusion Topology in Proton-Proton Collisions at root s=8 TeV. in Physical Review Letters, 118(2).
https://doi.org/10.1103/PhysRevLett.118.021802

Khachatryan V, Adžić P, Ćirković P, Devetak D, Milošević J, Reković V, Đorđević M, Milenović P. Search for Dark Matter and Supersymmetry with a Compressed Mass Spectrum in the Vector Boson Fusion Topology in Proton-Proton Collisions at root s=8 TeV. in Physical Review Letters. 2017;118(2).
doi:10.1103/PhysRevLett.118.021802 .

Khachatryan, V., Adžić, Petar, Ćirković, Predrag, Devetak, Damir, Milošević, Jovan, Reković, Vladimir, Đorđević, Miloš, Milenović, Predrag, "Search for Dark Matter and Supersymmetry with a Compressed Mass Spectrum in the Vector Boson Fusion Topology in Proton-Proton Collisions at root s=8 TeV" in Physical Review Letters, 118, no. 2 (2017),
https://doi.org/10.1103/PhysRevLett.118.021802 . .

TY  - JOUR
AU  - Khachatryan, V.
AU  - Adžić, Petar
AU  - Ćirković, Predrag
AU  - Devetak, Damir
AU  - Đorđević, Miloš
AU  - Milošević, Jovan
AU  - Reković, Vladimir
AU  - Milenović, Predrag
PY  - 2017
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/1377
AB  - An inclusive search for supersymmetry using razor variables is performed in events with four or more jets and no more than one lepton. The results are based on a sample of proton-proton collisions corresponding to an integrated luminosity of 2.3 fb(-1) collected with the CMS experiment at a center-ofmass energy of s root s = 13 TeV. No significant excess over the background prediction is observed in data, and 95% confidence level exclusion limits are placed on the masses of new heavy particles in a variety of simplified models. Assuming that pair-produced gluinos decay only via three-body processes involving third-generation quarks plus a neutralino, and that the neutralino is the lightest supersymmetric particle with a mass of 200 GeV, gluino masses below 1.6 TeV are excluded for any branching fractions for the individual gluino decay modes. For some specific decay mode scenarios, gluino masses up to 1.65 TeVare excluded. For decays to first-and second-generation quarks and a neutralino with a mass of 200 GeV, gluinos with masses up to 1.4 TeVare excluded. Pair production of top squarks decaying to a top quark and a neutralino with a mass of 100 GeV is excluded for top squark masses up to 750 GeV.
T2  - Physical Review D
T1  - Inclusive search for supersymmetry using razor variables in pp collisions at root s=13 TeV
VL  - 95
IS  - 1
DO  - 10.1103/PhysRevD.95.012003
ER  - 

@article{
author = "Khachatryan, V. and Adžić, Petar and Ćirković, Predrag and Devetak, Damir and Đorđević, Miloš and Milošević, Jovan and Reković, Vladimir and Milenović, Predrag",
year = "2017",
abstract = "An inclusive search for supersymmetry using razor variables is performed in events with four or more jets and no more than one lepton. The results are based on a sample of proton-proton collisions corresponding to an integrated luminosity of 2.3 fb(-1) collected with the CMS experiment at a center-ofmass energy of s root s = 13 TeV. No significant excess over the background prediction is observed in data, and 95% confidence level exclusion limits are placed on the masses of new heavy particles in a variety of simplified models. Assuming that pair-produced gluinos decay only via three-body processes involving third-generation quarks plus a neutralino, and that the neutralino is the lightest supersymmetric particle with a mass of 200 GeV, gluino masses below 1.6 TeV are excluded for any branching fractions for the individual gluino decay modes. For some specific decay mode scenarios, gluino masses up to 1.65 TeVare excluded. For decays to first-and second-generation quarks and a neutralino with a mass of 200 GeV, gluinos with masses up to 1.4 TeVare excluded. Pair production of top squarks decaying to a top quark and a neutralino with a mass of 100 GeV is excluded for top squark masses up to 750 GeV.",
journal = "Physical Review D",
title = "Inclusive search for supersymmetry using razor variables in pp collisions at root s=13 TeV",
volume = "95",
number = "1",
doi = "10.1103/PhysRevD.95.012003"
}

Khachatryan, V., Adžić, P., Ćirković, P., Devetak, D., Đorđević, M., Milošević, J., Reković, V.,& Milenović, P.. (2017). Inclusive search for supersymmetry using razor variables in pp collisions at root s=13 TeV. in Physical Review D, 95(1).
https://doi.org/10.1103/PhysRevD.95.012003

Khachatryan V, Adžić P, Ćirković P, Devetak D, Đorđević M, Milošević J, Reković V, Milenović P. Inclusive search for supersymmetry using razor variables in pp collisions at root s=13 TeV. in Physical Review D. 2017;95(1).
doi:10.1103/PhysRevD.95.012003 .

Khachatryan, V., Adžić, Petar, Ćirković, Predrag, Devetak, Damir, Đorđević, Miloš, Milošević, Jovan, Reković, Vladimir, Milenović, Predrag, "Inclusive search for supersymmetry using razor variables in pp collisions at root s=13 TeV" in Physical Review D, 95, no. 1 (2017),
https://doi.org/10.1103/PhysRevD.95.012003 . .

TY  - JOUR
AU  - Khachatryan, V.
AU  - Adžić, Petar
AU  - Ćirković, Predrag
AU  - Devetak, Damir
AU  - Đorđević, Miloš
AU  - Milošević, Jovan
AU  - Reković, Vladimir
AU  - Milenović, Predrag
PY  - 2017
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/1365
AB  - A search for heavy narrow resonances decaying into four-lepton final states has been performed using proton-proton collision data at root s= 8 TeVcollected by the CMS experiment, corresponding to an integrated luminosity of 19.7fb(-1). No excess of events over the standard model background expectation is observed. Upper limits for a benchmark model on the product of cross section and branching fraction for the production of these heavy narrow resonances are presented. The limit excludes leptophobic Z bosons with masses below 2.5 TeV within the benchmark model. This is the first result to constrain a leptophobic Z resonance in the four-lepton channel. (C) 2017 The Author(s). Published by Elsevier B.V.
T2  - Physics Letters B
T1  - Search for leptophobic Z bosons decaying into four-lepton final states in proton-proton collisions at root s=8 TeV
VL  - 773
SP  - 563
EP  - 584
DO  - 10.1016/j.physletb.2017.08.069
ER  - 

@article{
author = "Khachatryan, V. and Adžić, Petar and Ćirković, Predrag and Devetak, Damir and Đorđević, Miloš and Milošević, Jovan and Reković, Vladimir and Milenović, Predrag",
year = "2017",
abstract = "A search for heavy narrow resonances decaying into four-lepton final states has been performed using proton-proton collision data at root s= 8 TeVcollected by the CMS experiment, corresponding to an integrated luminosity of 19.7fb(-1). No excess of events over the standard model background expectation is observed. Upper limits for a benchmark model on the product of cross section and branching fraction for the production of these heavy narrow resonances are presented. The limit excludes leptophobic Z bosons with masses below 2.5 TeV within the benchmark model. This is the first result to constrain a leptophobic Z resonance in the four-lepton channel. (C) 2017 The Author(s). Published by Elsevier B.V.",
journal = "Physics Letters B",
title = "Search for leptophobic Z bosons decaying into four-lepton final states in proton-proton collisions at root s=8 TeV",
volume = "773",
pages = "563-584",
doi = "10.1016/j.physletb.2017.08.069"
}

Khachatryan, V., Adžić, P., Ćirković, P., Devetak, D., Đorđević, M., Milošević, J., Reković, V.,& Milenović, P.. (2017). Search for leptophobic Z bosons decaying into four-lepton final states in proton-proton collisions at root s=8 TeV. in Physics Letters B, 773, 563-584.
https://doi.org/10.1016/j.physletb.2017.08.069

Khachatryan V, Adžić P, Ćirković P, Devetak D, Đorđević M, Milošević J, Reković V, Milenović P. Search for leptophobic Z bosons decaying into four-lepton final states in proton-proton collisions at root s=8 TeV. in Physics Letters B. 2017;773:563-584.
doi:10.1016/j.physletb.2017.08.069 .

Khachatryan, V., Adžić, Petar, Ćirković, Predrag, Devetak, Damir, Đorđević, Miloš, Milošević, Jovan, Reković, Vladimir, Milenović, Predrag, "Search for leptophobic Z bosons decaying into four-lepton final states in proton-proton collisions at root s=8 TeV" in Physics Letters B, 773 (2017):563-584,
https://doi.org/10.1016/j.physletb.2017.08.069 . .

TY  - JOUR
AU  - Khachatryan, V.
AU  - Adžić, Petar
AU  - Ćirković, Predrag
AU  - Devetak, Damir
AU  - Đorđević, Miloš
AU  - Milošević, Jovan
AU  - Reković, Vladimir
AU  - Milenović, Predrag
PY  - 2017
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/1788
AB  - A search is presented for decays beyond the standard model of the 125 GeV Higgs bosons to a pair of light bosons, based on models with extended scalar sectors. Light boson masses between 5 and 62.5 GeV are probed in final states containing four tau leptons, two muons and two b quarks, or two muons and two tau leptons. The results are from data in proton-proton collisions corresponding to an integrated luminosity of 19.7 fb(-1), accumulated by the CMS experiment at the LHC at a center-of-mass energy of 8TeV. No evidence for such exotic decays is found in the data. Upper limits are set on the product of the cross section and branching fraction for several signal processes. The results are also compared to predictions of two-Higgs-doublet models, including those with an additional scalar singlet.
T2  - Journal of High Energy Physics
T1  - Search for light bosons in decays of the 125 GeV Higgs boson in proton-proton collisions at root s=8 TeV
IS  - 10
DO  - 10.1007/JHEP10(2017)076
ER  - 

@article{
author = "Khachatryan, V. and Adžić, Petar and Ćirković, Predrag and Devetak, Damir and Đorđević, Miloš and Milošević, Jovan and Reković, Vladimir and Milenović, Predrag",
year = "2017",
abstract = "A search is presented for decays beyond the standard model of the 125 GeV Higgs bosons to a pair of light bosons, based on models with extended scalar sectors. Light boson masses between 5 and 62.5 GeV are probed in final states containing four tau leptons, two muons and two b quarks, or two muons and two tau leptons. The results are from data in proton-proton collisions corresponding to an integrated luminosity of 19.7 fb(-1), accumulated by the CMS experiment at the LHC at a center-of-mass energy of 8TeV. No evidence for such exotic decays is found in the data. Upper limits are set on the product of the cross section and branching fraction for several signal processes. The results are also compared to predictions of two-Higgs-doublet models, including those with an additional scalar singlet.",
journal = "Journal of High Energy Physics",
title = "Search for light bosons in decays of the 125 GeV Higgs boson in proton-proton collisions at root s=8 TeV",
number = "10",
doi = "10.1007/JHEP10(2017)076"
}

Khachatryan, V., Adžić, P., Ćirković, P., Devetak, D., Đorđević, M., Milošević, J., Reković, V.,& Milenović, P.. (2017). Search for light bosons in decays of the 125 GeV Higgs boson in proton-proton collisions at root s=8 TeV. in Journal of High Energy Physics(10).
https://doi.org/10.1007/JHEP10(2017)076

Khachatryan V, Adžić P, Ćirković P, Devetak D, Đorđević M, Milošević J, Reković V, Milenović P. Search for light bosons in decays of the 125 GeV Higgs boson in proton-proton collisions at root s=8 TeV. in Journal of High Energy Physics. 2017;(10).
doi:10.1007/JHEP10(2017)076 .

Khachatryan, V., Adžić, Petar, Ćirković, Predrag, Devetak, Damir, Đorđević, Miloš, Milošević, Jovan, Reković, Vladimir, Milenović, Predrag, "Search for light bosons in decays of the 125 GeV Higgs boson in proton-proton collisions at root s=8 TeV" in Journal of High Energy Physics, no. 10 (2017),
https://doi.org/10.1007/JHEP10(2017)076 . .

TY  - JOUR
AU  - Khachatryan, V.
AU  - Adžić, Petar
AU  - Ćirković, Predrag
AU  - Devetak, Damir
AU  - Đorđević, Miloš
AU  - Milošević, Jovan
AU  - Reković, Vladimir
AU  - Milenović, Predrag
PY  - 2017
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/1750
AB  - Results are reported from a search for physics beyond the standard model in final states with at least three charged leptons, in any combination of electrons or muons. The data sample corresponds to an integrated luminosity of 2.3 fb(-1) of proton-proton collisions at root s = 13 TeV, recorded by the CMS experiment at the LHC in 2015. Two jets are required in each event, providing good sensitivity to strong production of gluinos and squarks. The search regions, sensitive to a range of different new physics scenarios, are defined using the number of jets tagged as originating from bottom quarks, the sum of the magnitudes of the transverse momenta of the jets, the imbalance in the overall transverse momentum in the event, and the invariant mass of opposite-sign, same-flavor lepton pairs. The event yields observed in data are consistent with the expected background contributions from standard model processes. These results are used to derive limits in terms of R-parity conserving simplified models of supersymmetry that describe strong production of gluinos and squarks. Model-independent limits are presented to facilitate the reinterpretation of the results in a broad range of scenarios for physics beyond the standard model.
T2  - European Physical Journal C. Particles and Fields
T1  - Search for new phenomena with multiple charged leptons in proton-proton collisions at root s=13TeV
VL  - 77
IS  - 9
DO  - 10.1140/epjc/s10052-017-5182-1
ER  - 

@article{
author = "Khachatryan, V. and Adžić, Petar and Ćirković, Predrag and Devetak, Damir and Đorđević, Miloš and Milošević, Jovan and Reković, Vladimir and Milenović, Predrag",
year = "2017",
abstract = "Results are reported from a search for physics beyond the standard model in final states with at least three charged leptons, in any combination of electrons or muons. The data sample corresponds to an integrated luminosity of 2.3 fb(-1) of proton-proton collisions at root s = 13 TeV, recorded by the CMS experiment at the LHC in 2015. Two jets are required in each event, providing good sensitivity to strong production of gluinos and squarks. The search regions, sensitive to a range of different new physics scenarios, are defined using the number of jets tagged as originating from bottom quarks, the sum of the magnitudes of the transverse momenta of the jets, the imbalance in the overall transverse momentum in the event, and the invariant mass of opposite-sign, same-flavor lepton pairs. The event yields observed in data are consistent with the expected background contributions from standard model processes. These results are used to derive limits in terms of R-parity conserving simplified models of supersymmetry that describe strong production of gluinos and squarks. Model-independent limits are presented to facilitate the reinterpretation of the results in a broad range of scenarios for physics beyond the standard model.",
journal = "European Physical Journal C. Particles and Fields",
title = "Search for new phenomena with multiple charged leptons in proton-proton collisions at root s=13TeV",
volume = "77",
number = "9",
doi = "10.1140/epjc/s10052-017-5182-1"
}

Khachatryan, V., Adžić, P., Ćirković, P., Devetak, D., Đorđević, M., Milošević, J., Reković, V.,& Milenović, P.. (2017). Search for new phenomena with multiple charged leptons in proton-proton collisions at root s=13TeV. in European Physical Journal C. Particles and Fields, 77(9).
https://doi.org/10.1140/epjc/s10052-017-5182-1

Khachatryan V, Adžić P, Ćirković P, Devetak D, Đorđević M, Milošević J, Reković V, Milenović P. Search for new phenomena with multiple charged leptons in proton-proton collisions at root s=13TeV. in European Physical Journal C. Particles and Fields. 2017;77(9).
doi:10.1140/epjc/s10052-017-5182-1 .

Khachatryan, V., Adžić, Petar, Ćirković, Predrag, Devetak, Damir, Đorđević, Miloš, Milošević, Jovan, Reković, Vladimir, Milenović, Predrag, "Search for new phenomena with multiple charged leptons in proton-proton collisions at root s=13TeV" in European Physical Journal C. Particles and Fields, 77, no. 9 (2017),
https://doi.org/10.1140/epjc/s10052-017-5182-1 . .

TY  - JOUR
AU  - Khachatryan, V.
AU  - Adžić, Petar
AU  - Ćirković, Predrag
AU  - Devetak, Damir
AU  - Milošević, Jovan
AU  - Reković, Vladimir
AU  - Đorđević, Miloš
AU  - Milenović, Predrag
PY  - 2017
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/1742
AB  - The cross section for coherent J/psi photoproduction accompanied by at least one neutron on one side of the interaction point and no neutron activity on the other side, Xn0n, is measured with the CMS experiment in ultra-peripheral PbPb collisions at root sNN= 2.76TeV. The analysis is based on a data sample corresponding to an integrated luminosity of 159 mu b(-1), collected during the 2011 PbPb run. The J/psi mesons are reconstructed in the dimuon decay channel, while neutrons are detected using zero degree calorimeters. The measured cross section is d sigma(Xn)o(n)(coh)/dy(J/psi) = 0.36 +/- 0.04 (stat)+/- 0.04 (syst) mbin the rapidity interval 1.8 LT vertical bar y vertical bar LT 2.3. Using a model for the relative rate of coherent photoproduction processes, this Xn0nmeasurement gives a total coherent photoproduction cross section of d sigma(coh/) dy(J/psi) = 1.82 +/- 0.22 (stat)+/- 0.20 (syst)+/- 0.19 (theo) mb. The data strongly disfavorthe impulse approximation model prediction, indicating that nuclear effects are needed to describe coherent J/psi photoproduction in.+ Pbinteractions. The data are found to be consistent with the leading twist approximation, which includes nuclear gluon shadowing. (C) 2017 The Author(s). Published by Elsevier B.V.
T2  - Physics Letters B
T1  - Coherent J/psi photoproduction in ultra-peripheral PbPb collisions at root s(NN)=2.76 TeV with the CMS experiment
VL  - 772
SP  - 489
EP  - 511
DO  - 10.1016/j.physletb.2017.07.001
ER  - 

@article{
author = "Khachatryan, V. and Adžić, Petar and Ćirković, Predrag and Devetak, Damir and Milošević, Jovan and Reković, Vladimir and Đorđević, Miloš and Milenović, Predrag",
year = "2017",
abstract = "The cross section for coherent J/psi photoproduction accompanied by at least one neutron on one side of the interaction point and no neutron activity on the other side, Xn0n, is measured with the CMS experiment in ultra-peripheral PbPb collisions at root sNN= 2.76TeV. The analysis is based on a data sample corresponding to an integrated luminosity of 159 mu b(-1), collected during the 2011 PbPb run. The J/psi mesons are reconstructed in the dimuon decay channel, while neutrons are detected using zero degree calorimeters. The measured cross section is d sigma(Xn)o(n)(coh)/dy(J/psi) = 0.36 +/- 0.04 (stat)+/- 0.04 (syst) mbin the rapidity interval 1.8 LT vertical bar y vertical bar LT 2.3. Using a model for the relative rate of coherent photoproduction processes, this Xn0nmeasurement gives a total coherent photoproduction cross section of d sigma(coh/) dy(J/psi) = 1.82 +/- 0.22 (stat)+/- 0.20 (syst)+/- 0.19 (theo) mb. The data strongly disfavorthe impulse approximation model prediction, indicating that nuclear effects are needed to describe coherent J/psi photoproduction in.+ Pbinteractions. The data are found to be consistent with the leading twist approximation, which includes nuclear gluon shadowing. (C) 2017 The Author(s). Published by Elsevier B.V.",
journal = "Physics Letters B",
title = "Coherent J/psi photoproduction in ultra-peripheral PbPb collisions at root s(NN)=2.76 TeV with the CMS experiment",
volume = "772",
pages = "489-511",
doi = "10.1016/j.physletb.2017.07.001"
}

Khachatryan, V., Adžić, P., Ćirković, P., Devetak, D., Milošević, J., Reković, V., Đorđević, M.,& Milenović, P.. (2017). Coherent J/psi photoproduction in ultra-peripheral PbPb collisions at root s(NN)=2.76 TeV with the CMS experiment. in Physics Letters B, 772, 489-511.
https://doi.org/10.1016/j.physletb.2017.07.001

Khachatryan V, Adžić P, Ćirković P, Devetak D, Milošević J, Reković V, Đorđević M, Milenović P. Coherent J/psi photoproduction in ultra-peripheral PbPb collisions at root s(NN)=2.76 TeV with the CMS experiment. in Physics Letters B. 2017;772:489-511.
doi:10.1016/j.physletb.2017.07.001 .

Khachatryan, V., Adžić, Petar, Ćirković, Predrag, Devetak, Damir, Milošević, Jovan, Reković, Vladimir, Đorđević, Miloš, Milenović, Predrag, "Coherent J/psi photoproduction in ultra-peripheral PbPb collisions at root s(NN)=2.76 TeV with the CMS experiment" in Physics Letters B, 772 (2017):489-511,
https://doi.org/10.1016/j.physletb.2017.07.001 . .

TY  - GEN
AU  - Khachatryan, V.
AU  - Adžić, Petar
AU  - Ćirković, Predrag
AU  - Devetak, Damir
AU  - Đorđević, Miloš
AU  - Milošević, Jovan
AU  - Reković, Vladimir
AU  - Milenović, Predrag
PY  - 2017
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/1683
T2  - Journal of High Energy Physics
T1  - search for dark matter in proton-proton collisions at 8 TeV with missing transverse momentum and vector boson tagged jet (vol 12, 083, 2016)
IS  - 8
DO  - 10.1007/JHEP08(2017)035
ER  - 

@misc{
author = "Khachatryan, V. and Adžić, Petar and Ćirković, Predrag and Devetak, Damir and Đorđević, Miloš and Milošević, Jovan and Reković, Vladimir and Milenović, Predrag",
year = "2017",
journal = "Journal of High Energy Physics",
title = "search for dark matter in proton-proton collisions at 8 TeV with missing transverse momentum and vector boson tagged jet (vol 12, 083, 2016)",
number = "8",
doi = "10.1007/JHEP08(2017)035"
}

Khachatryan, V., Adžić, P., Ćirković, P., Devetak, D., Đorđević, M., Milošević, J., Reković, V.,& Milenović, P.. (2017). search for dark matter in proton-proton collisions at 8 TeV with missing transverse momentum and vector boson tagged jet (vol 12, 083, 2016). in Journal of High Energy Physics(8).
https://doi.org/10.1007/JHEP08(2017)035

Khachatryan V, Adžić P, Ćirković P, Devetak D, Đorđević M, Milošević J, Reković V, Milenović P. search for dark matter in proton-proton collisions at 8 TeV with missing transverse momentum and vector boson tagged jet (vol 12, 083, 2016). in Journal of High Energy Physics. 2017;(8).
doi:10.1007/JHEP08(2017)035 .

Khachatryan, V., Adžić, Petar, Ćirković, Predrag, Devetak, Damir, Đorđević, Miloš, Milošević, Jovan, Reković, Vladimir, Milenović, Predrag, "search for dark matter in proton-proton collisions at 8 TeV with missing transverse momentum and vector boson tagged jet (vol 12, 083, 2016)" in Journal of High Energy Physics, no. 8 (2017),
https://doi.org/10.1007/JHEP08(2017)035 . .

TY  - JOUR
AU  - Khachatryan, V.
AU  - Adžić, Petar
AU  - Ćirković, Predrag
AU  - Milošević, Jovan
AU  - Reković, Vladimir
AU  - Đorđević, Miloš
AU  - Milenović, Predrag
PY  - 2017
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/1660
AB  - Two-particle correlations in pPb collisions at a nucleon-nucleon center-of-mass energy of 5.02 TeV are studied as a function of the pseudorapidity separation (Delta eta) of the particle pair at small relative azimuthal angle (|Delta phi| LT pi/3). The correlations are decomposed into a jet component that dominates the short-range correlations (|Delta eta| LT 1), and a component that persists at large Delta eta and may originate from collective behavior of the produced system. The events are classified in terms of the multiplicity of the produced particles. Finite azimuthal anisotropies are observed in high-multiplicity events. The second and third Fourier components of the particle-pair azimuthal correlations, V2 and V3, are extracted after subtraction of the jet component. The single-particle anisotropy parameters v2 and v3 are normalized by their laboratory frame midrapidity value and are studied as a function of eta(c.m). The normalized v2 distribution is found to be asymmetric about eta(c.m.) = 0, with smaller values observed at forward pseudorapidity, corresponding to the direction of the proton beam, while no significant pseudorapidity dependence is observed for the normalized v3 distribution within the statistical uncertainties.
T2  - Physical Review C
T1  - Pseudorapidity dependence of long-range two-particle correlations in pPb collisions at root sNN=5.02 TeV
VL  - 96
IS  - 1
DO  - 10.1103/PhysRevC.96.014915
ER  - 

@article{
author = "Khachatryan, V. and Adžić, Petar and Ćirković, Predrag and Milošević, Jovan and Reković, Vladimir and Đorđević, Miloš and Milenović, Predrag",
year = "2017",
abstract = "Two-particle correlations in pPb collisions at a nucleon-nucleon center-of-mass energy of 5.02 TeV are studied as a function of the pseudorapidity separation (Delta eta) of the particle pair at small relative azimuthal angle (|Delta phi| LT pi/3). The correlations are decomposed into a jet component that dominates the short-range correlations (|Delta eta| LT 1), and a component that persists at large Delta eta and may originate from collective behavior of the produced system. The events are classified in terms of the multiplicity of the produced particles. Finite azimuthal anisotropies are observed in high-multiplicity events. The second and third Fourier components of the particle-pair azimuthal correlations, V2 and V3, are extracted after subtraction of the jet component. The single-particle anisotropy parameters v2 and v3 are normalized by their laboratory frame midrapidity value and are studied as a function of eta(c.m). The normalized v2 distribution is found to be asymmetric about eta(c.m.) = 0, with smaller values observed at forward pseudorapidity, corresponding to the direction of the proton beam, while no significant pseudorapidity dependence is observed for the normalized v3 distribution within the statistical uncertainties.",
journal = "Physical Review C",
title = "Pseudorapidity dependence of long-range two-particle correlations in pPb collisions at root sNN=5.02 TeV",
volume = "96",
number = "1",
doi = "10.1103/PhysRevC.96.014915"
}

Khachatryan, V., Adžić, P., Ćirković, P., Milošević, J., Reković, V., Đorđević, M.,& Milenović, P.. (2017). Pseudorapidity dependence of long-range two-particle correlations in pPb collisions at root sNN=5.02 TeV. in Physical Review C, 96(1).
https://doi.org/10.1103/PhysRevC.96.014915

Khachatryan V, Adžić P, Ćirković P, Milošević J, Reković V, Đorđević M, Milenović P. Pseudorapidity dependence of long-range two-particle correlations in pPb collisions at root sNN=5.02 TeV. in Physical Review C. 2017;96(1).
doi:10.1103/PhysRevC.96.014915 .

Khachatryan, V., Adžić, Petar, Ćirković, Predrag, Milošević, Jovan, Reković, Vladimir, Đorđević, Miloš, Milenović, Predrag, "Pseudorapidity dependence of long-range two-particle correlations in pPb collisions at root sNN=5.02 TeV" in Physical Review C, 96, no. 1 (2017),
https://doi.org/10.1103/PhysRevC.96.014915 . .

TY  - JOUR
AU  - Khachatryan, V.
AU  - Adžić, Petar
AU  - Ćirković, Predrag
AU  - Devetak, Damir
AU  - Đorđević, Miloš
AU  - Milošević, Jovan
AU  - Reković, Vladimir
AU  - Milenović, Predrag
PY  - 2017
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/1657
AB  - A search is presented for supersymmetry in all-hadronic events with missing transverse momentum and tagged top quarks. The data sample was collected with the CMS detector at the LHC and corresponds to an integrated luminosity of 2.3 fb(-1) of proton-proton collisions at a center-of-mass energy of 13 TeV. Search regions are defined using the properties of reconstructed jets, the multiplicity of bottom and top quark candidates, and an imbalance in transverse momentum. With no statistically significant excess of events observed beyond the expected contributions from the standard model, we set exclusion limits at 95% confidence level on the masses of new particles in the context of simplified models of direct and gluino-mediated top squark production. For direct top squark production with decays to a top quark and a neutralino, top squark masses up to 740 GeV and neutralino masses up to 240 GeV are excluded. Gluino masses up to 1550 GeV and neutralino masses up to 900 GeV are excluded for a gluino-mediated production case, where each of the pair-produced gluinos decays to a top-antitop quark pair and a neutralino.
T2  - Physical Review D
T1  - Search for supersymmetry in the all-hadronic final state using top quark tagging in pp collisions at root s=13 TeV
VL  - 96
IS  - 1
DO  - 10.1103/PhysRevD.96.012004
ER  - 

@article{
author = "Khachatryan, V. and Adžić, Petar and Ćirković, Predrag and Devetak, Damir and Đorđević, Miloš and Milošević, Jovan and Reković, Vladimir and Milenović, Predrag",
year = "2017",
abstract = "A search is presented for supersymmetry in all-hadronic events with missing transverse momentum and tagged top quarks. The data sample was collected with the CMS detector at the LHC and corresponds to an integrated luminosity of 2.3 fb(-1) of proton-proton collisions at a center-of-mass energy of 13 TeV. Search regions are defined using the properties of reconstructed jets, the multiplicity of bottom and top quark candidates, and an imbalance in transverse momentum. With no statistically significant excess of events observed beyond the expected contributions from the standard model, we set exclusion limits at 95% confidence level on the masses of new particles in the context of simplified models of direct and gluino-mediated top squark production. For direct top squark production with decays to a top quark and a neutralino, top squark masses up to 740 GeV and neutralino masses up to 240 GeV are excluded. Gluino masses up to 1550 GeV and neutralino masses up to 900 GeV are excluded for a gluino-mediated production case, where each of the pair-produced gluinos decays to a top-antitop quark pair and a neutralino.",
journal = "Physical Review D",
title = "Search for supersymmetry in the all-hadronic final state using top quark tagging in pp collisions at root s=13 TeV",
volume = "96",
number = "1",
doi = "10.1103/PhysRevD.96.012004"
}

Khachatryan, V., Adžić, P., Ćirković, P., Devetak, D., Đorđević, M., Milošević, J., Reković, V.,& Milenović, P.. (2017). Search for supersymmetry in the all-hadronic final state using top quark tagging in pp collisions at root s=13 TeV. in Physical Review D, 96(1).
https://doi.org/10.1103/PhysRevD.96.012004

Khachatryan V, Adžić P, Ćirković P, Devetak D, Đorđević M, Milošević J, Reković V, Milenović P. Search for supersymmetry in the all-hadronic final state using top quark tagging in pp collisions at root s=13 TeV. in Physical Review D. 2017;96(1).
doi:10.1103/PhysRevD.96.012004 .

Khachatryan, V., Adžić, Petar, Ćirković, Predrag, Devetak, Damir, Đorđević, Miloš, Milošević, Jovan, Reković, Vladimir, Milenović, Predrag, "Search for supersymmetry in the all-hadronic final state using top quark tagging in pp collisions at root s=13 TeV" in Physical Review D, 96, no. 1 (2017),
https://doi.org/10.1103/PhysRevD.96.012004 . .

TY  - JOUR
AU  - Khachatryan, V.
AU  - Adžić, Petar
AU  - Ćirković, Predrag
AU  - Devetak, Damir
AU  - Đorđević, Miloš
AU  - Milošević, Jovan
AU  - Reković, Vladimir
AU  - Milenović, Predrag
PY  - 2017
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/1654
AB  - The differential cross sections for inclusive production of B+ hadrons are measured as a function of the B+ transverse momentum p(T)(B) and rapidity y(B) in pp collisions at a centre-of-mass energy of 13 TeV, using data collected by the CMS experiment that correspond to an integrated luminosity of 48.1 pb(-1). The measurement uses the exclusive decay channel B+ - GT J/psi K+, with J/psi mesons that decay to a pair of muons. The results show a reasonable agreement with theoretical calculations within the uncertainties. (C) 2017 The Author(s). Published by Elsevier B.V.
T2  - Physics Letters B
T1  - Measurement of the differential inclusive B+ hadron cross sections in pp collisions at root s=13TeV
VL  - 771
SP  - 435
EP  - 456
DO  - 10.1016/j.physletb.2017.05.074
ER  - 

@article{
author = "Khachatryan, V. and Adžić, Petar and Ćirković, Predrag and Devetak, Damir and Đorđević, Miloš and Milošević, Jovan and Reković, Vladimir and Milenović, Predrag",
year = "2017",
abstract = "The differential cross sections for inclusive production of B+ hadrons are measured as a function of the B+ transverse momentum p(T)(B) and rapidity y(B) in pp collisions at a centre-of-mass energy of 13 TeV, using data collected by the CMS experiment that correspond to an integrated luminosity of 48.1 pb(-1). The measurement uses the exclusive decay channel B+ - GT J/psi K+, with J/psi mesons that decay to a pair of muons. The results show a reasonable agreement with theoretical calculations within the uncertainties. (C) 2017 The Author(s). Published by Elsevier B.V.",
journal = "Physics Letters B",
title = "Measurement of the differential inclusive B+ hadron cross sections in pp collisions at root s=13TeV",
volume = "771",
pages = "435-456",
doi = "10.1016/j.physletb.2017.05.074"
}

Khachatryan, V., Adžić, P., Ćirković, P., Devetak, D., Đorđević, M., Milošević, J., Reković, V.,& Milenović, P.. (2017). Measurement of the differential inclusive B+ hadron cross sections in pp collisions at root s=13TeV. in Physics Letters B, 771, 435-456.
https://doi.org/10.1016/j.physletb.2017.05.074

Khachatryan V, Adžić P, Ćirković P, Devetak D, Đorđević M, Milošević J, Reković V, Milenović P. Measurement of the differential inclusive B+ hadron cross sections in pp collisions at root s=13TeV. in Physics Letters B. 2017;771:435-456.
doi:10.1016/j.physletb.2017.05.074 .

Khachatryan, V., Adžić, Petar, Ćirković, Predrag, Devetak, Damir, Đorđević, Miloš, Milošević, Jovan, Reković, Vladimir, Milenović, Predrag, "Measurement of the differential inclusive B+ hadron cross sections in pp collisions at root s=13TeV" in Physics Letters B, 771 (2017):435-456,
https://doi.org/10.1016/j.physletb.2017.05.074 . .

TY  - JOUR
AU  - Khachatryan, V.
AU  - Adžić, Petar
AU  - Ćirković, Predrag
AU  - Devetak, Damir
AU  - Đorđević, Miloš
AU  - Milošević, Jovan
AU  - Reković, Vladimir
AU  - Milenović, Predrag
PY  - 2017
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/1653
AB  - A search for single production of vector-like top quark partners (T) decaying into a Higgs boson and atop quark is performed using data from pp collisions at acentre-of-mass energy of 13 TeV collected by the CMS experiment at the CERN LHC, corresponding to an integrated luminosity of 2.3 fb(-1). The top quark decay includes an electron or a muon while the Higgs boson decays into a pair of b quarks. No significant excess over standard model backgrounds is observed. Exclusion limits on the product of the production cross section and the branching fraction are derived in the T quark mass range 700 to 1800 GeV. For a mass of 1000 GeV, values of the product of the production cross section and the branching fraction greater than 0.8 and 0.7 pb are excluded at 95% confidence level, assuming left-and right-handed coupling of the T quark to standard model particles, respectively. This is the first analysis setting exclusion limits on the cross section of singly produced vector-like T quarks at a centre-of-mass energy of 13 TeV. (C) 2017 The Author(s). Published by Elsevier B.V.
T2  - Physics Letters B
T1  - Search for single production of a heavy vector-like T quark decaying to a Higgs boson and a top quark with a lepton and jets in the final state
VL  - 771
SP  - 80
EP  - 105
DO  - 10.1016/j.physletb.2017.05.019
ER  - 

@article{
author = "Khachatryan, V. and Adžić, Petar and Ćirković, Predrag and Devetak, Damir and Đorđević, Miloš and Milošević, Jovan and Reković, Vladimir and Milenović, Predrag",
year = "2017",
abstract = "A search for single production of vector-like top quark partners (T) decaying into a Higgs boson and atop quark is performed using data from pp collisions at acentre-of-mass energy of 13 TeV collected by the CMS experiment at the CERN LHC, corresponding to an integrated luminosity of 2.3 fb(-1). The top quark decay includes an electron or a muon while the Higgs boson decays into a pair of b quarks. No significant excess over standard model backgrounds is observed. Exclusion limits on the product of the production cross section and the branching fraction are derived in the T quark mass range 700 to 1800 GeV. For a mass of 1000 GeV, values of the product of the production cross section and the branching fraction greater than 0.8 and 0.7 pb are excluded at 95% confidence level, assuming left-and right-handed coupling of the T quark to standard model particles, respectively. This is the first analysis setting exclusion limits on the cross section of singly produced vector-like T quarks at a centre-of-mass energy of 13 TeV. (C) 2017 The Author(s). Published by Elsevier B.V.",
journal = "Physics Letters B",
title = "Search for single production of a heavy vector-like T quark decaying to a Higgs boson and a top quark with a lepton and jets in the final state",
volume = "771",
pages = "80-105",
doi = "10.1016/j.physletb.2017.05.019"
}

Khachatryan, V., Adžić, P., Ćirković, P., Devetak, D., Đorđević, M., Milošević, J., Reković, V.,& Milenović, P.. (2017). Search for single production of a heavy vector-like T quark decaying to a Higgs boson and a top quark with a lepton and jets in the final state. in Physics Letters B, 771, 80-105.
https://doi.org/10.1016/j.physletb.2017.05.019

Khachatryan V, Adžić P, Ćirković P, Devetak D, Đorđević M, Milošević J, Reković V, Milenović P. Search for single production of a heavy vector-like T quark decaying to a Higgs boson and a top quark with a lepton and jets in the final state. in Physics Letters B. 2017;771:80-105.
doi:10.1016/j.physletb.2017.05.019 .

Khachatryan, V., Adžić, Petar, Ćirković, Predrag, Devetak, Damir, Đorđević, Miloš, Milošević, Jovan, Reković, Vladimir, Milenović, Predrag, "Search for single production of a heavy vector-like T quark decaying to a Higgs boson and a top quark with a lepton and jets in the final state" in Physics Letters B, 771 (2017):80-105,
https://doi.org/10.1016/j.physletb.2017.05.019 . .

TY  - JOUR
AU  - Khachatryan, V.
AU  - Adžić, Petar
AU  - Ćirković, Predrag
AU  - Devetak, Damir
AU  - Đorđević, Miloš
AU  - Milošević, Jovan
AU  - Reković, Vladimir
AU  - Milenović, Predrag
PY  - 2017
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/1646
AB  - Inclusive jet spectra from pp and PbPb collisions at a nucleon-nucleon center-of-mass energy of 2.76 TeV, collected with the CMS detector at the CERN Large Hadron Collider, are presented. Jets are reconstructed with three different distance parameters (R = 0.2, 0.3, and 0.4) for transverse momentum (p(T)) greater than 70 GeV/c and pseudorapidity |eta| LT 2. Next-to-leading-order quantum chromodynamic calculations with nonperturbative corrections are found to overpredict jet production cross sections in pp for small distance parameters. The jet nuclear modification factors for PbPb compared to pp collisions, show a steady decrease from peripheral to central events, along with a weak dependence on the jet p(T). They are found to be independent of the distance parameter in the measured kinematic range.
T2  - Physical Review C
T1  - Measurement of inclusive jet cross sections in pp and PbPb collisions at root s(NN)=2.76 TeV
VL  - 96
IS  - 1
DO  - 10.1103/PhysRevC.96.015202
ER  - 

@article{
author = "Khachatryan, V. and Adžić, Petar and Ćirković, Predrag and Devetak, Damir and Đorđević, Miloš and Milošević, Jovan and Reković, Vladimir and Milenović, Predrag",
year = "2017",
abstract = "Inclusive jet spectra from pp and PbPb collisions at a nucleon-nucleon center-of-mass energy of 2.76 TeV, collected with the CMS detector at the CERN Large Hadron Collider, are presented. Jets are reconstructed with three different distance parameters (R = 0.2, 0.3, and 0.4) for transverse momentum (p(T)) greater than 70 GeV/c and pseudorapidity |eta| LT 2. Next-to-leading-order quantum chromodynamic calculations with nonperturbative corrections are found to overpredict jet production cross sections in pp for small distance parameters. The jet nuclear modification factors for PbPb compared to pp collisions, show a steady decrease from peripheral to central events, along with a weak dependence on the jet p(T). They are found to be independent of the distance parameter in the measured kinematic range.",
journal = "Physical Review C",
title = "Measurement of inclusive jet cross sections in pp and PbPb collisions at root s(NN)=2.76 TeV",
volume = "96",
number = "1",
doi = "10.1103/PhysRevC.96.015202"
}

Khachatryan, V., Adžić, P., Ćirković, P., Devetak, D., Đorđević, M., Milošević, J., Reković, V.,& Milenović, P.. (2017). Measurement of inclusive jet cross sections in pp and PbPb collisions at root s(NN)=2.76 TeV. in Physical Review C, 96(1).
https://doi.org/10.1103/PhysRevC.96.015202

Khachatryan V, Adžić P, Ćirković P, Devetak D, Đorđević M, Milošević J, Reković V, Milenović P. Measurement of inclusive jet cross sections in pp and PbPb collisions at root s(NN)=2.76 TeV. in Physical Review C. 2017;96(1).
doi:10.1103/PhysRevC.96.015202 .

Khachatryan, V., Adžić, Petar, Ćirković, Predrag, Devetak, Damir, Đorđević, Miloš, Milošević, Jovan, Reković, Vladimir, Milenović, Predrag, "Measurement of inclusive jet cross sections in pp and PbPb collisions at root s(NN)=2.76 TeV" in Physical Review C, 96, no. 1 (2017),
https://doi.org/10.1103/PhysRevC.96.015202 . .

TY  - JOUR
AU  - Khachatryan, V.
AU  - Adžić, Petar
AU  - Ćirković, Predrag
AU  - Devetak, Damir
AU  - Milošević, Jovan
AU  - Reković, Vladimir
AU  - Đorđević, Miloš
AU  - Milenović, Predrag
PY  - 2017
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/1620
AB  - A measurement is presented of the cross section for the electroweak production of a Z boson and a photon in association with two jets in proton-proton collisions at root s = 8 TeV. The Z bosons are identified through their decays to electron or muon pairs. The measurement is based on data collected with the CMS detector corresponding to an integrated luminosity of 19.7 fb(-1). The electroweak contribution has a significance of 3.0 standard deviations, and the measured fiducial cross section is 1.86(-0.75)(+0.90)(stat)(-0.26)(+0.34)(syst) +/- 0.05(lumi) fb, while the summed electroweak and quantum chromodynamic total cross section in the same region is observed to be 5.94(-1.35)(+1.53) (stat)(-0.37)(+0.43)(syst) +/- 0.13(lumi) fb. Both measurements are consistent with the leading-order standard model predictions. Limits on anomalous quartic gauge couplings are set based on the Z gamma mass distribution. (C) 2017 The Author. Published by Elsevier B.V.
T2  - Physics Letters B
T1  - Measurement of the cross section for electroweak production of Z gamma in association with two jets and constraints on anomalous quartic gauge couplings in proton-proton collisions at root s=8 TeV
VL  - 770
SP  - 380
EP  - 402
DO  - 10.1016/j.physletb.2017.04.071
ER  - 

@article{
author = "Khachatryan, V. and Adžić, Petar and Ćirković, Predrag and Devetak, Damir and Milošević, Jovan and Reković, Vladimir and Đorđević, Miloš and Milenović, Predrag",
year = "2017",
abstract = "A measurement is presented of the cross section for the electroweak production of a Z boson and a photon in association with two jets in proton-proton collisions at root s = 8 TeV. The Z bosons are identified through their decays to electron or muon pairs. The measurement is based on data collected with the CMS detector corresponding to an integrated luminosity of 19.7 fb(-1). The electroweak contribution has a significance of 3.0 standard deviations, and the measured fiducial cross section is 1.86(-0.75)(+0.90)(stat)(-0.26)(+0.34)(syst) +/- 0.05(lumi) fb, while the summed electroweak and quantum chromodynamic total cross section in the same region is observed to be 5.94(-1.35)(+1.53) (stat)(-0.37)(+0.43)(syst) +/- 0.13(lumi) fb. Both measurements are consistent with the leading-order standard model predictions. Limits on anomalous quartic gauge couplings are set based on the Z gamma mass distribution. (C) 2017 The Author. Published by Elsevier B.V.",
journal = "Physics Letters B",
title = "Measurement of the cross section for electroweak production of Z gamma in association with two jets and constraints on anomalous quartic gauge couplings in proton-proton collisions at root s=8 TeV",
volume = "770",
pages = "380-402",
doi = "10.1016/j.physletb.2017.04.071"
}

Khachatryan, V., Adžić, P., Ćirković, P., Devetak, D., Milošević, J., Reković, V., Đorđević, M.,& Milenović, P.. (2017). Measurement of the cross section for electroweak production of Z gamma in association with two jets and constraints on anomalous quartic gauge couplings in proton-proton collisions at root s=8 TeV. in Physics Letters B, 770, 380-402.
https://doi.org/10.1016/j.physletb.2017.04.071

Khachatryan V, Adžić P, Ćirković P, Devetak D, Milošević J, Reković V, Đorđević M, Milenović P. Measurement of the cross section for electroweak production of Z gamma in association with two jets and constraints on anomalous quartic gauge couplings in proton-proton collisions at root s=8 TeV. in Physics Letters B. 2017;770:380-402.
doi:10.1016/j.physletb.2017.04.071 .

Khachatryan, V., Adžić, Petar, Ćirković, Predrag, Devetak, Damir, Milošević, Jovan, Reković, Vladimir, Đorđević, Miloš, Milenović, Predrag, "Measurement of the cross section for electroweak production of Z gamma in association with two jets and constraints on anomalous quartic gauge couplings in proton-proton collisions at root s=8 TeV" in Physics Letters B, 770 (2017):380-402,
https://doi.org/10.1016/j.physletb.2017.04.071 . .

TY  - JOUR
AU  - Khachatryan, V.
AU  - Adžić, Petar
AU  - Ćirković, Predrag
AU  - Devetak, Damir
AU  - Đorđević, Miloš
AU  - Milošević, Jovan
AU  - Reković, Vladimir
AU  - Milenović, Predrag
PY  - 2017
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/1619
AB  - The production yields of gamma(1S), gamma(2S), and gamma(3S) quarkonium states are measured through their decays into muon pairs in the CMS detector, in PbPb and pp collisions at the centre-of-mass energy per nucleon pair of 2.76TeV. The data correspond to integrated luminosities of 166 mu b(-1) and 5.4 pb(-1) for PbPb and pp collisions, respectively. Differential production cross sections are reported as functions of gamma rapidity y up to 2.4, and transverse momentum PT up to 20 GeV/c. A strong centrality-dependent suppression is observed in PbPb relative to pp collisions, by factors of up to approximate to 2 and 8, for the gamma(1S) and gamma(2S) states, respectively. No significant dependence of this suppression is observed as a function of y or PT. The gamma(3S) state is not observed in PbPb collisions, which corresponds to a suppression for the centrality-integrated data by at least a factor of approximate to 7 at a 95% confidence level. The observed suppression is in agreement with theoretical scenarios modeling the sequential melting of quarkonium states in a quark gluon plasma. (C) 2017 The Author(s). Published by Elsevier B.V.
T2  - Physics Letters B
T1  - Suppression of gamma(1S), gamma(2S), and gamma(3S) quarkonium states in PbPb collisions at root S-NN=2.76TeV
VL  - 770
SP  - 357
EP  - 379
DO  - 10.1016/j.physletb.2017.04.031
ER  - 

@article{
author = "Khachatryan, V. and Adžić, Petar and Ćirković, Predrag and Devetak, Damir and Đorđević, Miloš and Milošević, Jovan and Reković, Vladimir and Milenović, Predrag",
year = "2017",
abstract = "The production yields of gamma(1S), gamma(2S), and gamma(3S) quarkonium states are measured through their decays into muon pairs in the CMS detector, in PbPb and pp collisions at the centre-of-mass energy per nucleon pair of 2.76TeV. The data correspond to integrated luminosities of 166 mu b(-1) and 5.4 pb(-1) for PbPb and pp collisions, respectively. Differential production cross sections are reported as functions of gamma rapidity y up to 2.4, and transverse momentum PT up to 20 GeV/c. A strong centrality-dependent suppression is observed in PbPb relative to pp collisions, by factors of up to approximate to 2 and 8, for the gamma(1S) and gamma(2S) states, respectively. No significant dependence of this suppression is observed as a function of y or PT. The gamma(3S) state is not observed in PbPb collisions, which corresponds to a suppression for the centrality-integrated data by at least a factor of approximate to 7 at a 95% confidence level. The observed suppression is in agreement with theoretical scenarios modeling the sequential melting of quarkonium states in a quark gluon plasma. (C) 2017 The Author(s). Published by Elsevier B.V.",
journal = "Physics Letters B",
title = "Suppression of gamma(1S), gamma(2S), and gamma(3S) quarkonium states in PbPb collisions at root S-NN=2.76TeV",
volume = "770",
pages = "357-379",
doi = "10.1016/j.physletb.2017.04.031"
}

Khachatryan, V., Adžić, P., Ćirković, P., Devetak, D., Đorđević, M., Milošević, J., Reković, V.,& Milenović, P.. (2017). Suppression of gamma(1S), gamma(2S), and gamma(3S) quarkonium states in PbPb collisions at root S-NN=2.76TeV. in Physics Letters B, 770, 357-379.
https://doi.org/10.1016/j.physletb.2017.04.031

Khachatryan V, Adžić P, Ćirković P, Devetak D, Đorđević M, Milošević J, Reković V, Milenović P. Suppression of gamma(1S), gamma(2S), and gamma(3S) quarkonium states in PbPb collisions at root S-NN=2.76TeV. in Physics Letters B. 2017;770:357-379.
doi:10.1016/j.physletb.2017.04.031 .

Khachatryan, V., Adžić, Petar, Ćirković, Predrag, Devetak, Damir, Đorđević, Miloš, Milošević, Jovan, Reković, Vladimir, Milenović, Predrag, "Suppression of gamma(1S), gamma(2S), and gamma(3S) quarkonium states in PbPb collisions at root S-NN=2.76TeV" in Physics Letters B, 770 (2017):357-379,
https://doi.org/10.1016/j.physletb.2017.04.031 . .

TY  - JOUR
AU  - Khachatryan, V.
AU  - Adžić, Petar
AU  - Ćirković, Predrag
AU  - Devetak, Damir
AU  - Đorđević, Miloš
AU  - Milošević, Jovan
AU  - Reković, Vladimir
AU  - Milenović, Predrag
PY  - 2017
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/1618
AB  - A search is presented for W bosons in events with an electron or muon and large missing transverse momentum, using proton-proton collision data at root s = 13 TeV collected with the CMS detector in 2015 and corresponding to an integrated luminosity of 2.3 fb(-1). No evidence of an excess of events relative to the standard model expectations is observed. For a W boson described by the sequential standard model, upper limits at 95% confidence level are set on the product of the production cross section and branching fraction and lower limits are established on the new boson mass. Masses below 4.1 TeV are excluded combining electron and muon decay channels, significantly improving upon the results obtained with the 8 TeV data. Exclusion limits at 95% confidence level on the product of the W production cross section and branching fraction are also derived in combination with the 8 TeV data. Finally, exclusion limits are set for the production of generic W bosons decaying into this final state using a model-independent approach. (C) 2017 The Author. Published by Elsevier B.V.
T2  - Physics Letters B
T1  - Search for heavy gauge W bosons in events with an energetic lepton and large missing transverse momentum at root s=13TeV
VL  - 770
SP  - 278
EP  - 301
DO  - 10.1016/j.physletb.2017.04.043
ER  - 

@article{
author = "Khachatryan, V. and Adžić, Petar and Ćirković, Predrag and Devetak, Damir and Đorđević, Miloš and Milošević, Jovan and Reković, Vladimir and Milenović, Predrag",
year = "2017",
abstract = "A search is presented for W bosons in events with an electron or muon and large missing transverse momentum, using proton-proton collision data at root s = 13 TeV collected with the CMS detector in 2015 and corresponding to an integrated luminosity of 2.3 fb(-1). No evidence of an excess of events relative to the standard model expectations is observed. For a W boson described by the sequential standard model, upper limits at 95% confidence level are set on the product of the production cross section and branching fraction and lower limits are established on the new boson mass. Masses below 4.1 TeV are excluded combining electron and muon decay channels, significantly improving upon the results obtained with the 8 TeV data. Exclusion limits at 95% confidence level on the product of the W production cross section and branching fraction are also derived in combination with the 8 TeV data. Finally, exclusion limits are set for the production of generic W bosons decaying into this final state using a model-independent approach. (C) 2017 The Author. Published by Elsevier B.V.",
journal = "Physics Letters B",
title = "Search for heavy gauge W bosons in events with an energetic lepton and large missing transverse momentum at root s=13TeV",
volume = "770",
pages = "278-301",
doi = "10.1016/j.physletb.2017.04.043"
}

Khachatryan, V., Adžić, P., Ćirković, P., Devetak, D., Đorđević, M., Milošević, J., Reković, V.,& Milenović, P.. (2017). Search for heavy gauge W bosons in events with an energetic lepton and large missing transverse momentum at root s=13TeV. in Physics Letters B, 770, 278-301.
https://doi.org/10.1016/j.physletb.2017.04.043

Khachatryan V, Adžić P, Ćirković P, Devetak D, Đorđević M, Milošević J, Reković V, Milenović P. Search for heavy gauge W bosons in events with an energetic lepton and large missing transverse momentum at root s=13TeV. in Physics Letters B. 2017;770:278-301.
doi:10.1016/j.physletb.2017.04.043 .

Khachatryan, V., Adžić, Petar, Ćirković, Predrag, Devetak, Damir, Đorđević, Miloš, Milošević, Jovan, Reković, Vladimir, Milenović, Predrag, "Search for heavy gauge W bosons in events with an energetic lepton and large missing transverse momentum at root s=13TeV" in Physics Letters B, 770 (2017):278-301,
https://doi.org/10.1016/j.physletb.2017.04.043 . .

TY  - JOUR
AU  - Khachatryan, V.
AU  - Adžić, Petar
AU  - Ćirković, Predrag
AU  - Devetak, Damir
AU  - Đorđević, Miloš
AU  - Milošević, Jovan
AU  - Reković, Vladimir
AU  - Milenović, Predrag
PY  - 2017
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/1615
AB  - A measurement of electroweak-induced production of W gamma and two jets is performed, where the W boson decays leptonically. The data used in the analysis correspond to an integrated luminosity of 19.7 fb(-1) collected by the CMS experiment in root s = 8TeV proton-proton collisions produced at the LHC. Candidate events are selected with exactly one muon or electron, missing transverse momentum, one photon, and two jets with large rapidity separation. An excess over the hypothesis of the standard model without electroweak production of W gamma with two jets is observed with a signi fi cance of 2.7 standard deviations. The cross section measured in the fi ducial region is 10.8 +/- 4.1(stat) +/- 3.4(syst) +/- 0. 3(lumi) fb, which is consistent with the standard model electroweak prediction. The total cross section for W gamma in association with two jets in the same fi ducial region is measured to be 23.2 +/- 4.3(stat) +/- 1.7(syst) +/- 0.6(lumi) fb, which is consistent with the standard model prediction from the combination of electroweakand quantum chromodynamics-induced processes. No deviations are observed from the standard model predictions and experimental limits on anomalous quartic gauge couplings integral M,0- 7 /Lambda(4), integral T,0- 2 /Lambda(4), and integral T,5-7/Lambda(4) are set at 95% con fi dence level.
T2  - Journal of High Energy Physics
T1  - Measurement of electroweak-induced production of W gamma with two jets in pp collisions at root s=8TeV and constraints on anomalous quartic gauge couplings
IS  - 6
DO  - 10.1007/JHEP06(2017)106
ER  - 

@article{
author = "Khachatryan, V. and Adžić, Petar and Ćirković, Predrag and Devetak, Damir and Đorđević, Miloš and Milošević, Jovan and Reković, Vladimir and Milenović, Predrag",
year = "2017",
abstract = "A measurement of electroweak-induced production of W gamma and two jets is performed, where the W boson decays leptonically. The data used in the analysis correspond to an integrated luminosity of 19.7 fb(-1) collected by the CMS experiment in root s = 8TeV proton-proton collisions produced at the LHC. Candidate events are selected with exactly one muon or electron, missing transverse momentum, one photon, and two jets with large rapidity separation. An excess over the hypothesis of the standard model without electroweak production of W gamma with two jets is observed with a signi fi cance of 2.7 standard deviations. The cross section measured in the fi ducial region is 10.8 +/- 4.1(stat) +/- 3.4(syst) +/- 0. 3(lumi) fb, which is consistent with the standard model electroweak prediction. The total cross section for W gamma in association with two jets in the same fi ducial region is measured to be 23.2 +/- 4.3(stat) +/- 1.7(syst) +/- 0.6(lumi) fb, which is consistent with the standard model prediction from the combination of electroweakand quantum chromodynamics-induced processes. No deviations are observed from the standard model predictions and experimental limits on anomalous quartic gauge couplings integral M,0- 7 /Lambda(4), integral T,0- 2 /Lambda(4), and integral T,5-7/Lambda(4) are set at 95% con fi dence level.",
journal = "Journal of High Energy Physics",
title = "Measurement of electroweak-induced production of W gamma with two jets in pp collisions at root s=8TeV and constraints on anomalous quartic gauge couplings",
number = "6",
doi = "10.1007/JHEP06(2017)106"
}

Khachatryan, V., Adžić, P., Ćirković, P., Devetak, D., Đorđević, M., Milošević, J., Reković, V.,& Milenović, P.. (2017). Measurement of electroweak-induced production of W gamma with two jets in pp collisions at root s=8TeV and constraints on anomalous quartic gauge couplings. in Journal of High Energy Physics(6).
https://doi.org/10.1007/JHEP06(2017)106

Khachatryan V, Adžić P, Ćirković P, Devetak D, Đorđević M, Milošević J, Reković V, Milenović P. Measurement of electroweak-induced production of W gamma with two jets in pp collisions at root s=8TeV and constraints on anomalous quartic gauge couplings. in Journal of High Energy Physics. 2017;(6).
doi:10.1007/JHEP06(2017)106 .

Khachatryan, V., Adžić, Petar, Ćirković, Predrag, Devetak, Damir, Đorđević, Miloš, Milošević, Jovan, Reković, Vladimir, Milenović, Predrag, "Measurement of electroweak-induced production of W gamma with two jets in pp collisions at root s=8TeV and constraints on anomalous quartic gauge couplings" in Journal of High Energy Physics, no. 6 (2017),
https://doi.org/10.1007/JHEP06(2017)106 . .

TY  - JOUR
AU  - Khachatryan, V.
AU  - Adžić, Petar
AU  - Ćirković, Predrag
AU  - Devetak, Damir
AU  - Đorđević, Miloš
AU  - Milošević, Jovan
AU  - Reković, Vladimir
AU  - Milenović, Predrag
PY  - 2017
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/1593
AB  - The results of a search for new physics in final states with photons and missing transverse energy are reported. The study is based on a sample of proton-proton collisions collected at a center-of-mass energy of 13 TeV with the CMS detector in 2015, corresponding to an integrated luminosity of 2.3 fb(-1). Final states with two photons and significant missing transverse energy are used to search for supersymmetric particles in models of supersymmetry (SUSY) with general gauge-mediated (GGM) supersymmetry breaking. No excess is observed with respect to the standard model expectation, and the results are used to set limits on gluino pair production and squark pair production in the GGM SUSY framework. Gluino masses below 1.65 TeV and squark masses below 1.37 TeV are excluded at a 95% confidence level. (C) 2017 The Author(s). Published by Elsevier B.V.
T2  - Physics Letters B
T1  - Search for supersymmetry in events with photons and missing transverse energy in pp collisions at 13 TeV
VL  - 769
SP  - 391
EP  - 412
DO  - 10.1016/j.physletb.2017.04.005
ER  - 

@article{
author = "Khachatryan, V. and Adžić, Petar and Ćirković, Predrag and Devetak, Damir and Đorđević, Miloš and Milošević, Jovan and Reković, Vladimir and Milenović, Predrag",
year = "2017",
abstract = "The results of a search for new physics in final states with photons and missing transverse energy are reported. The study is based on a sample of proton-proton collisions collected at a center-of-mass energy of 13 TeV with the CMS detector in 2015, corresponding to an integrated luminosity of 2.3 fb(-1). Final states with two photons and significant missing transverse energy are used to search for supersymmetric particles in models of supersymmetry (SUSY) with general gauge-mediated (GGM) supersymmetry breaking. No excess is observed with respect to the standard model expectation, and the results are used to set limits on gluino pair production and squark pair production in the GGM SUSY framework. Gluino masses below 1.65 TeV and squark masses below 1.37 TeV are excluded at a 95% confidence level. (C) 2017 The Author(s). Published by Elsevier B.V.",
journal = "Physics Letters B",
title = "Search for supersymmetry in events with photons and missing transverse energy in pp collisions at 13 TeV",
volume = "769",
pages = "391-412",
doi = "10.1016/j.physletb.2017.04.005"
}

Khachatryan, V., Adžić, P., Ćirković, P., Devetak, D., Đorđević, M., Milošević, J., Reković, V.,& Milenović, P.. (2017). Search for supersymmetry in events with photons and missing transverse energy in pp collisions at 13 TeV. in Physics Letters B, 769, 391-412.
https://doi.org/10.1016/j.physletb.2017.04.005

Khachatryan V, Adžić P, Ćirković P, Devetak D, Đorđević M, Milošević J, Reković V, Milenović P. Search for supersymmetry in events with photons and missing transverse energy in pp collisions at 13 TeV. in Physics Letters B. 2017;769:391-412.
doi:10.1016/j.physletb.2017.04.005 .

Khachatryan, V., Adžić, Petar, Ćirković, Predrag, Devetak, Damir, Đorđević, Miloš, Milošević, Jovan, Reković, Vladimir, Milenović, Predrag, "Search for supersymmetry in events with photons and missing transverse energy in pp collisions at 13 TeV" in Physics Letters B, 769 (2017):391-412,
https://doi.org/10.1016/j.physletb.2017.04.005 . .

TY  - JOUR
AU  - Khachatryan, V.
AU  - Adžić, Petar
AU  - Ćirković, Predrag
AU  - Devetak, Damir
AU  - Đorđević, Miloš
AU  - Milošević, Jovan
AU  - Reković, Vladimir
AU  - Milenović, Predrag
PY  - 2017
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/1561
AB  - A search for new phenomena is performed in final states containing one or more jets and an imbalance in transverse momentum in pp collisions at a centre-of-mass energy of 13 TeV. The analysed data sample, recorded with the CMS detector at the CERN LHC, corresponds to an integrated luminosity of 2.3 fb(-1). Several kinematic variables are employed to suppress the dominant background, multijet production, as well as to discriminate between other standard model and new physics processes. The search provides sensitivity to a broad range of new-physics models that yield a stable weakly interacting massive particle. The number of observed candidate events is found to agree with the expected contributions from standard model processes, and the result is interpreted in the mass parameter space of fourteen simplified supersymmetric models that assume the pair production of gluinos or squarks and a range of decay modes. For models that assume gluino pair production, masses up to 1575 and 975 GeV are excluded for gluinos and neutralinos, respectively. For models involving the pair production of top squarks and compressed mass spectra, top squark masses up to 400 GeV are excluded.
T2  - European Physical Journal C. Particles and Fields
T1  - A search for new phenomena in pp collisions at root s=13TeV in final states with missing transverse momentum and at least one jet using the alpha(T) variable
VL  - 77
IS  - 5
DO  - 10.1140/epjc/s10052-017-4787-8
ER  - 

@article{
author = "Khachatryan, V. and Adžić, Petar and Ćirković, Predrag and Devetak, Damir and Đorđević, Miloš and Milošević, Jovan and Reković, Vladimir and Milenović, Predrag",
year = "2017",
abstract = "A search for new phenomena is performed in final states containing one or more jets and an imbalance in transverse momentum in pp collisions at a centre-of-mass energy of 13 TeV. The analysed data sample, recorded with the CMS detector at the CERN LHC, corresponds to an integrated luminosity of 2.3 fb(-1). Several kinematic variables are employed to suppress the dominant background, multijet production, as well as to discriminate between other standard model and new physics processes. The search provides sensitivity to a broad range of new-physics models that yield a stable weakly interacting massive particle. The number of observed candidate events is found to agree with the expected contributions from standard model processes, and the result is interpreted in the mass parameter space of fourteen simplified supersymmetric models that assume the pair production of gluinos or squarks and a range of decay modes. For models that assume gluino pair production, masses up to 1575 and 975 GeV are excluded for gluinos and neutralinos, respectively. For models involving the pair production of top squarks and compressed mass spectra, top squark masses up to 400 GeV are excluded.",
journal = "European Physical Journal C. Particles and Fields",
title = "A search for new phenomena in pp collisions at root s=13TeV in final states with missing transverse momentum and at least one jet using the alpha(T) variable",
volume = "77",
number = "5",
doi = "10.1140/epjc/s10052-017-4787-8"
}

Khachatryan, V., Adžić, P., Ćirković, P., Devetak, D., Đorđević, M., Milošević, J., Reković, V.,& Milenović, P.. (2017). A search for new phenomena in pp collisions at root s=13TeV in final states with missing transverse momentum and at least one jet using the alpha(T) variable. in European Physical Journal C. Particles and Fields, 77(5).
https://doi.org/10.1140/epjc/s10052-017-4787-8

Khachatryan V, Adžić P, Ćirković P, Devetak D, Đorđević M, Milošević J, Reković V, Milenović P. A search for new phenomena in pp collisions at root s=13TeV in final states with missing transverse momentum and at least one jet using the alpha(T) variable. in European Physical Journal C. Particles and Fields. 2017;77(5).
doi:10.1140/epjc/s10052-017-4787-8 .

Khachatryan, V., Adžić, Petar, Ćirković, Predrag, Devetak, Damir, Đorđević, Miloš, Milošević, Jovan, Reković, Vladimir, Milenović, Predrag, "A search for new phenomena in pp collisions at root s=13TeV in final states with missing transverse momentum and at least one jet using the alpha(T) variable" in European Physical Journal C. Particles and Fields, 77, no. 5 (2017),
https://doi.org/10.1140/epjc/s10052-017-4787-8 . .

TY  - JOUR
AU  - Khachatryan, V.
AU  - Adžić, Petar
AU  - Ćirković, Predrag
AU  - Devetak, Damir
AU  - Đorđević, Miloš
AU  - Milošević, Jovan
AU  - Reković, Vladimir
AU  - Milenović, Predrag
PY  - 2017
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/1557
AB  - Pair production of gamma(1S) mesons is observed at the LHC in proton-proton collisions at root s = 8 TeV by the CMS experiment in a data sample corresponding to an integrated luminosity of 20.7 fb(-1). Both gamma(1S) candidates are fully reconstructed via their decays to mu(+) mu(-). The fiducial acceptance region is defined by an absolute gamma(1S) rapidity smaller than 2.0. The fiducial cross section for the production of gamma(1S) pairs, assuming that both mesons decay isotropically, is measured to be 68.8 +/- 12.7 (stat) +/- 7.4 (syst) +/- 2.8 (B) pb, where the third uncertainty comes from the uncertainty in the branching fraction of gamma(1S) decays to mu(+) mu(-). Assuming instead that the gamma(1S) mesons are produced with different polarizations leads to variations in the measured cross section in the range from 38% to +36%.
T2  - Journal of High Energy Physics
T1  - Observation of gamma(1S) pair production in proton-proton collisions at root s=8 TeV
IS  - 5
DO  - 10.1007/JHEP05(2017)013
ER  - 

@article{
author = "Khachatryan, V. and Adžić, Petar and Ćirković, Predrag and Devetak, Damir and Đorđević, Miloš and Milošević, Jovan and Reković, Vladimir and Milenović, Predrag",
year = "2017",
abstract = "Pair production of gamma(1S) mesons is observed at the LHC in proton-proton collisions at root s = 8 TeV by the CMS experiment in a data sample corresponding to an integrated luminosity of 20.7 fb(-1). Both gamma(1S) candidates are fully reconstructed via their decays to mu(+) mu(-). The fiducial acceptance region is defined by an absolute gamma(1S) rapidity smaller than 2.0. The fiducial cross section for the production of gamma(1S) pairs, assuming that both mesons decay isotropically, is measured to be 68.8 +/- 12.7 (stat) +/- 7.4 (syst) +/- 2.8 (B) pb, where the third uncertainty comes from the uncertainty in the branching fraction of gamma(1S) decays to mu(+) mu(-). Assuming instead that the gamma(1S) mesons are produced with different polarizations leads to variations in the measured cross section in the range from 38% to +36%.",
journal = "Journal of High Energy Physics",
title = "Observation of gamma(1S) pair production in proton-proton collisions at root s=8 TeV",
number = "5",
doi = "10.1007/JHEP05(2017)013"
}

Khachatryan, V., Adžić, P., Ćirković, P., Devetak, D., Đorđević, M., Milošević, J., Reković, V.,& Milenović, P.. (2017). Observation of gamma(1S) pair production in proton-proton collisions at root s=8 TeV. in Journal of High Energy Physics(5).
https://doi.org/10.1007/JHEP05(2017)013

Khachatryan V, Adžić P, Ćirković P, Devetak D, Đorđević M, Milošević J, Reković V, Milenović P. Observation of gamma(1S) pair production in proton-proton collisions at root s=8 TeV. in Journal of High Energy Physics. 2017;(5).
doi:10.1007/JHEP05(2017)013 .

Khachatryan, V., Adžić, Petar, Ćirković, Predrag, Devetak, Damir, Đorđević, Miloš, Milošević, Jovan, Reković, Vladimir, Milenović, Predrag, "Observation of gamma(1S) pair production in proton-proton collisions at root s=8 TeV" in Journal of High Energy Physics, no. 5 (2017),
https://doi.org/10.1007/JHEP05(2017)013 . .

TY  - JOUR
AU  - Khachatryan, V.
AU  - Adžić, Petar
AU  - Ćirković, Predrag
AU  - Devetak, Damir
AU  - Đorđević, Miloš
AU  - Milošević, Jovan
AU  - Reković, Vladimir
AU  - Milenović, Predrag
PY  - 2017
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/1554
AB  - A search for supersymmetry is performed in events with a single electron or muon in proton-proton collisions at a center-of-mass energy of 13 TeV. The data were recorded by the CMS experiment at the LHC and correspond to an integrated luminosity of 2.3 fb-1. Several exclusive search regions are defined based on the number of jets and b-tagged jets, the scalar sum of the jet transverse momenta, and the scalar sum of the missing transverse momentum and the transverse momentum of the lepton. The observed event yields in data are consistent with the expected backgrounds from standard model processes. The results are interpreted using two simplified models of supersymmetric particle spectra, both of which describe gluino pair production. In the first model, each gluino decays via a three-body process to top quarks and a neutralino, which is associated with the observed missing transverse momentum in the event. Gluinos with masses up to 1.6 TeV are excluded for neutralino masses below 600 GeV. In the second model, each gluino decays via a three-body process to two light quarks and a chargino, which subsequently decays to a W boson and a neutralino. The mass of the chargino is taken to be midway between the gluino and neutralino masses. In this model, gluinos with masses below 1.4 TeV are excluded for neutralino masses below 700 GeV.
T2  - Physical Review D
T1  - Search for supersymmetry in events with one lepton and multiple jets in proton-proton collisions at root s=13 TeV
VL  - 95
IS  - 1
DO  - 10.1103/PhysRevD.95.012011
ER  - 

@article{
author = "Khachatryan, V. and Adžić, Petar and Ćirković, Predrag and Devetak, Damir and Đorđević, Miloš and Milošević, Jovan and Reković, Vladimir and Milenović, Predrag",
year = "2017",
abstract = "A search for supersymmetry is performed in events with a single electron or muon in proton-proton collisions at a center-of-mass energy of 13 TeV. The data were recorded by the CMS experiment at the LHC and correspond to an integrated luminosity of 2.3 fb-1. Several exclusive search regions are defined based on the number of jets and b-tagged jets, the scalar sum of the jet transverse momenta, and the scalar sum of the missing transverse momentum and the transverse momentum of the lepton. The observed event yields in data are consistent with the expected backgrounds from standard model processes. The results are interpreted using two simplified models of supersymmetric particle spectra, both of which describe gluino pair production. In the first model, each gluino decays via a three-body process to top quarks and a neutralino, which is associated with the observed missing transverse momentum in the event. Gluinos with masses up to 1.6 TeV are excluded for neutralino masses below 600 GeV. In the second model, each gluino decays via a three-body process to two light quarks and a chargino, which subsequently decays to a W boson and a neutralino. The mass of the chargino is taken to be midway between the gluino and neutralino masses. In this model, gluinos with masses below 1.4 TeV are excluded for neutralino masses below 700 GeV.",
journal = "Physical Review D",
title = "Search for supersymmetry in events with one lepton and multiple jets in proton-proton collisions at root s=13 TeV",
volume = "95",
number = "1",
doi = "10.1103/PhysRevD.95.012011"
}

Khachatryan, V., Adžić, P., Ćirković, P., Devetak, D., Đorđević, M., Milošević, J., Reković, V.,& Milenović, P.. (2017). Search for supersymmetry in events with one lepton and multiple jets in proton-proton collisions at root s=13 TeV. in Physical Review D, 95(1).
https://doi.org/10.1103/PhysRevD.95.012011

Khachatryan V, Adžić P, Ćirković P, Devetak D, Đorđević M, Milošević J, Reković V, Milenović P. Search for supersymmetry in events with one lepton and multiple jets in proton-proton collisions at root s=13 TeV. in Physical Review D. 2017;95(1).
doi:10.1103/PhysRevD.95.012011 .

Khachatryan, V., Adžić, Petar, Ćirković, Predrag, Devetak, Damir, Đorđević, Miloš, Milošević, Jovan, Reković, Vladimir, Milenović, Predrag, "Search for supersymmetry in events with one lepton and multiple jets in proton-proton collisions at root s=13 TeV" in Physical Review D, 95, no. 1 (2017),
https://doi.org/10.1103/PhysRevD.95.012011 . .

TY  - JOUR
AU  - Khachatryan, V.
AU  - Adžić, Petar
AU  - Ćirković, Predrag
AU  - Devetak, Damir
AU  - Đorđević, Miloš
AU  - Milošević, Jovan
AU  - Reković, Vladimir
AU  - Milenović, Predrag
PY  - 2017
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/1553
AB  - Results are reported from a search for R-parity violating supersymmetry in proton-proton collision events collected by the CMS experiment at a center-of-mass energy of root s = 8 TeV. The data sample corresponds to an integrated luminosity of 17.6 fb(-1). This search assumes a minimal flavor violating model in which the lightest supersymmetric particle is a long-lived neutralino or gluino, leading to a signal with jets emanating from displaced vertices. In a sample of events with two displaced vertices, no excess yield above the expectation from standard model processes is observed, and limits are placed on the pair production cross section as a function of mass and lifetime of the neutralino or gluino. At 95% confidence level, the analysis excludes cross sections above approximately 1 fb for neutralinos or gluinos with mass between 400 and 1500 GeV and mean proper decay length between 1 and 30 mm. Gluino masses are excluded below 1 and 1.3 TeV for mean proper decay lengths of 300 mu m and 1 mm, respectively, and below 1.4 TeV for the range 2-30 mm. The results are also applicable to other models in which long-lived particles decay into multijet final states.
T2  - Physical Review D
T1  - Search for R-parity violating supersymmetry with displaced vertices in proton-proton collisions at root s=8 TeV
VL  - 95
IS  - 1
DO  - 10.1103/PhysRevD.95.012009
ER  - 

@article{
author = "Khachatryan, V. and Adžić, Petar and Ćirković, Predrag and Devetak, Damir and Đorđević, Miloš and Milošević, Jovan and Reković, Vladimir and Milenović, Predrag",
year = "2017",
abstract = "Results are reported from a search for R-parity violating supersymmetry in proton-proton collision events collected by the CMS experiment at a center-of-mass energy of root s = 8 TeV. The data sample corresponds to an integrated luminosity of 17.6 fb(-1). This search assumes a minimal flavor violating model in which the lightest supersymmetric particle is a long-lived neutralino or gluino, leading to a signal with jets emanating from displaced vertices. In a sample of events with two displaced vertices, no excess yield above the expectation from standard model processes is observed, and limits are placed on the pair production cross section as a function of mass and lifetime of the neutralino or gluino. At 95% confidence level, the analysis excludes cross sections above approximately 1 fb for neutralinos or gluinos with mass between 400 and 1500 GeV and mean proper decay length between 1 and 30 mm. Gluino masses are excluded below 1 and 1.3 TeV for mean proper decay lengths of 300 mu m and 1 mm, respectively, and below 1.4 TeV for the range 2-30 mm. The results are also applicable to other models in which long-lived particles decay into multijet final states.",
journal = "Physical Review D",
title = "Search for R-parity violating supersymmetry with displaced vertices in proton-proton collisions at root s=8 TeV",
volume = "95",
number = "1",
doi = "10.1103/PhysRevD.95.012009"
}

Khachatryan, V., Adžić, P., Ćirković, P., Devetak, D., Đorđević, M., Milošević, J., Reković, V.,& Milenović, P.. (2017). Search for R-parity violating supersymmetry with displaced vertices in proton-proton collisions at root s=8 TeV. in Physical Review D, 95(1).
https://doi.org/10.1103/PhysRevD.95.012009

Khachatryan V, Adžić P, Ćirković P, Devetak D, Đorđević M, Milošević J, Reković V, Milenović P. Search for R-parity violating supersymmetry with displaced vertices in proton-proton collisions at root s=8 TeV. in Physical Review D. 2017;95(1).
doi:10.1103/PhysRevD.95.012009 .

Khachatryan, V., Adžić, Petar, Ćirković, Predrag, Devetak, Damir, Đorđević, Miloš, Milošević, Jovan, Reković, Vladimir, Milenović, Predrag, "Search for R-parity violating supersymmetry with displaced vertices in proton-proton collisions at root s=8 TeV" in Physical Review D, 95, no. 1 (2017),
https://doi.org/10.1103/PhysRevD.95.012009 . .

TY  - JOUR
AU  - Khachatryan, V.
AU  - Adžić, Petar
AU  - Ćirković, Predrag
AU  - Devetak, Damir
AU  - Đorđević, Miloš
AU  - Milošević, Jovan
AU  - Reković, Vladimir
AU  - Milenović, Predrag
PY  - 2017
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/1549
AB  - A search for heavy resonances decaying to a Higgs boson and a vector boson is presented. The analysis is performed using data samples collected in 2015 by the CMS experiment at the LHC in proton-proton collisions at a center-of-mass energy of 13TeV, corresponding to integrated luminosities of 2.2-2.5 fb(-1). The search is performed in channels in which the vector boson decays into leptonic final states ( Z - GT nu nu., W - GT l nu, and Z - GT ll, with l = e, mu), while the Higgs boson decays to collimated b quark pairs detected as a single massive jet. The discriminating power of a jet mass requirement and a b jet tagging algorithm are exploited to suppress the standard model backgrounds. The event yields observed in data are consistent with the background expectation. In the context of a theoretical model with a heavy vector triplet, a resonance with mass less than 2TeV is excluded at 95% confidence level. The results are also interpreted in terms of limits on the parameters of the model, improving on the reach of previous searches. (C) 2017 The Author. Published by Elsevier B.V.
T2  - Physics Letters B
T1  - Search for heavy resonances decaying into a vector boson and a Higgs boson in final states with charged leptons, neutrinos, and b quarks
VL  - 768
SP  - 137
EP  - 162
DO  - 10.1016/j.physletb.2017.02.040
ER  - 

@article{
author = "Khachatryan, V. and Adžić, Petar and Ćirković, Predrag and Devetak, Damir and Đorđević, Miloš and Milošević, Jovan and Reković, Vladimir and Milenović, Predrag",
year = "2017",
abstract = "A search for heavy resonances decaying to a Higgs boson and a vector boson is presented. The analysis is performed using data samples collected in 2015 by the CMS experiment at the LHC in proton-proton collisions at a center-of-mass energy of 13TeV, corresponding to integrated luminosities of 2.2-2.5 fb(-1). The search is performed in channels in which the vector boson decays into leptonic final states ( Z - GT nu nu., W - GT l nu, and Z - GT ll, with l = e, mu), while the Higgs boson decays to collimated b quark pairs detected as a single massive jet. The discriminating power of a jet mass requirement and a b jet tagging algorithm are exploited to suppress the standard model backgrounds. The event yields observed in data are consistent with the background expectation. In the context of a theoretical model with a heavy vector triplet, a resonance with mass less than 2TeV is excluded at 95% confidence level. The results are also interpreted in terms of limits on the parameters of the model, improving on the reach of previous searches. (C) 2017 The Author. Published by Elsevier B.V.",
journal = "Physics Letters B",
title = "Search for heavy resonances decaying into a vector boson and a Higgs boson in final states with charged leptons, neutrinos, and b quarks",
volume = "768",
pages = "137-162",
doi = "10.1016/j.physletb.2017.02.040"
}

Khachatryan, V., Adžić, P., Ćirković, P., Devetak, D., Đorđević, M., Milošević, J., Reković, V.,& Milenović, P.. (2017). Search for heavy resonances decaying into a vector boson and a Higgs boson in final states with charged leptons, neutrinos, and b quarks. in Physics Letters B, 768, 137-162.
https://doi.org/10.1016/j.physletb.2017.02.040

Khachatryan V, Adžić P, Ćirković P, Devetak D, Đorđević M, Milošević J, Reković V, Milenović P. Search for heavy resonances decaying into a vector boson and a Higgs boson in final states with charged leptons, neutrinos, and b quarks. in Physics Letters B. 2017;768:137-162.
doi:10.1016/j.physletb.2017.02.040 .

Khachatryan, V., Adžić, Petar, Ćirković, Predrag, Devetak, Damir, Đorđević, Miloš, Milošević, Jovan, Reković, Vladimir, Milenović, Predrag, "Search for heavy resonances decaying into a vector boson and a Higgs boson in final states with charged leptons, neutrinos, and b quarks" in Physics Letters B, 768 (2017):137-162,
https://doi.org/10.1016/j.physletb.2017.02.040 . .

TY  - JOUR
AU  - Khachatryan, V.
AU  - Adžić, Petar
AU  - Ćirković, Predrag
AU  - Devetak, Damir
AU  - Milošević, Jovan
AU  - Reković, Vladimir
AU  - Đorđević, Miloš
AU  - Milenović, Predrag
PY  - 2017
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/1548
AB  - Measurements of strange hadron (K-S(0), Lambda +(Lambda) over bar, and Xi(-)+(Xi) over bar (+)) transverse momentum spectra in pp, pPb, and PbPb collisions are presented over a wide range of rapidity and event charged-particle multiplicity. The data were collected with the CMS detector at the CERN LHC in pp collisions at root s= 7 TeV, pPb collisions at root(NN)-N-s= 5.02 TeV, and PbPb collisions at root(NN)-N-s = 2.76 TeV. The average transverse kinetic energy is found to increase with multiplicity, at a faster rate for heavier strange particle species in all systems. At similar multiplicities, the difference in average transverse kinetic energy between different particle species is observed to be larger for pp and pPb events than for PbPb events. In pPb collisions, the average transverse kinetic energy is found to be slightly larger in the Pb-going direction than in the p-going direction for events with large multiplicity. The spectra are compared to models motivated by hydrodynamics. (c) 2017 The Author(s). Published by Elsevier B.V.
T2  - Physics Letters B
T1  - Multiplicity and rapidity dependence of strange hadron production in pp, pPb, and PbPb collisions at the LHC
VL  - 768
SP  - 103
EP  - 129
DO  - 10.1016/j.physletb.2017.01.075
ER  - 

@article{
author = "Khachatryan, V. and Adžić, Petar and Ćirković, Predrag and Devetak, Damir and Milošević, Jovan and Reković, Vladimir and Đorđević, Miloš and Milenović, Predrag",
year = "2017",
abstract = "Measurements of strange hadron (K-S(0), Lambda +(Lambda) over bar, and Xi(-)+(Xi) over bar (+)) transverse momentum spectra in pp, pPb, and PbPb collisions are presented over a wide range of rapidity and event charged-particle multiplicity. The data were collected with the CMS detector at the CERN LHC in pp collisions at root s= 7 TeV, pPb collisions at root(NN)-N-s= 5.02 TeV, and PbPb collisions at root(NN)-N-s = 2.76 TeV. The average transverse kinetic energy is found to increase with multiplicity, at a faster rate for heavier strange particle species in all systems. At similar multiplicities, the difference in average transverse kinetic energy between different particle species is observed to be larger for pp and pPb events than for PbPb events. In pPb collisions, the average transverse kinetic energy is found to be slightly larger in the Pb-going direction than in the p-going direction for events with large multiplicity. The spectra are compared to models motivated by hydrodynamics. (c) 2017 The Author(s). Published by Elsevier B.V.",
journal = "Physics Letters B",
title = "Multiplicity and rapidity dependence of strange hadron production in pp, pPb, and PbPb collisions at the LHC",
volume = "768",
pages = "103-129",
doi = "10.1016/j.physletb.2017.01.075"
}

Khachatryan, V., Adžić, P., Ćirković, P., Devetak, D., Milošević, J., Reković, V., Đorđević, M.,& Milenović, P.. (2017). Multiplicity and rapidity dependence of strange hadron production in pp, pPb, and PbPb collisions at the LHC. in Physics Letters B, 768, 103-129.
https://doi.org/10.1016/j.physletb.2017.01.075

Khachatryan V, Adžić P, Ćirković P, Devetak D, Milošević J, Reković V, Đorđević M, Milenović P. Multiplicity and rapidity dependence of strange hadron production in pp, pPb, and PbPb collisions at the LHC. in Physics Letters B. 2017;768:103-129.
doi:10.1016/j.physletb.2017.01.075 .

Khachatryan, V., Adžić, Petar, Ćirković, Predrag, Devetak, Damir, Milošević, Jovan, Reković, Vladimir, Đorđević, Miloš, Milenović, Predrag, "Multiplicity and rapidity dependence of strange hadron production in pp, pPb, and PbPb collisions at the LHC" in Physics Letters B, 768 (2017):103-129,
https://doi.org/10.1016/j.physletb.2017.01.075 . .