TY  - JOUR
AU  - Aad, G.
AU  - Agatonović-Jovin, Tatjana
AU  - Ćirković, Predrag
AU  - Dimitrievska, A.
AU  - Krstić, Jelena
AU  - Mamužić, Judita
AU  - Marjanović, M.
AU  - Popović, D. S.
AU  - Sijacki, D. J.
AU  - Simic, L. J.
AU  - Vranješ, Nenad
AU  - Vranješ Milosavljević, Marija
PY  - 2015
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/514
AB  - A search is performed for top-quark pairs (t (t) over bar) produced together with a photon (gamma) with transverse energy greater than 20 GeV using a sample of t (t) over bar candidate events in final states with jets, missing transverse momentum, and one isolated electron or muon. The data set used corresponds to an integrated luminosity of 4.59 fb(-1) of proton-proton collisions at a center-of-mass energy of 7 TeV recorded by the ATLAS detector at the CERN Large Hadron Collider. In total, 140 and 222 t (t) over bar gamma candidate events are observed in the electron and muon channels, to be compared to the expectation of 79 +/- 26 and 120 +/- 39 non-t (t) over bar gamma background events, respectively. The production of t (t) over bar gamma events is observed with a significance of 5.3 standard deviations away from the null hypothesis. The t (t) over bar gamma production cross section times the branching ratio (BR) of the single-lepton decay channel is measured in a fiducial kinematic region within the ATLAS acceptance. The measured value is sigma(fid)(t (t) over bar gamma) x BR = 63 +/- 8(stat)(-13)(+17) (syst) +/- 1(lumi) fb per lepton flavor, in good agreement with the leading-order theoretical calculation normalized to the next-to-leading-order theoretical prediction of 48 +/- 10 fb.
T2  - Physical Review D
T1  - Observation of top-quark pair production in association with a photon and measurement of the t(t)over-bar gamma production cross section in pp collisions at root s=7 TeV using the ATLAS detector
VL  - 91
IS  - 7
DO  - 10.1103/PhysRevD.91.072007
ER  - 

@article{
author = "Aad, G. and Agatonović-Jovin, Tatjana and Ćirković, Predrag and Dimitrievska, A. and Krstić, Jelena and Mamužić, Judita and Marjanović, M. and Popović, D. S. and Sijacki, D. J. and Simic, L. J. and Vranješ, Nenad and Vranješ Milosavljević, Marija",
year = "2015",
abstract = "A search is performed for top-quark pairs (t (t) over bar) produced together with a photon (gamma) with transverse energy greater than 20 GeV using a sample of t (t) over bar candidate events in final states with jets, missing transverse momentum, and one isolated electron or muon. The data set used corresponds to an integrated luminosity of 4.59 fb(-1) of proton-proton collisions at a center-of-mass energy of 7 TeV recorded by the ATLAS detector at the CERN Large Hadron Collider. In total, 140 and 222 t (t) over bar gamma candidate events are observed in the electron and muon channels, to be compared to the expectation of 79 +/- 26 and 120 +/- 39 non-t (t) over bar gamma background events, respectively. The production of t (t) over bar gamma events is observed with a significance of 5.3 standard deviations away from the null hypothesis. The t (t) over bar gamma production cross section times the branching ratio (BR) of the single-lepton decay channel is measured in a fiducial kinematic region within the ATLAS acceptance. The measured value is sigma(fid)(t (t) over bar gamma) x BR = 63 +/- 8(stat)(-13)(+17) (syst) +/- 1(lumi) fb per lepton flavor, in good agreement with the leading-order theoretical calculation normalized to the next-to-leading-order theoretical prediction of 48 +/- 10 fb.",
journal = "Physical Review D",
title = "Observation of top-quark pair production in association with a photon and measurement of the t(t)over-bar gamma production cross section in pp collisions at root s=7 TeV using the ATLAS detector",
volume = "91",
number = "7",
doi = "10.1103/PhysRevD.91.072007"
}

Aad, G., Agatonović-Jovin, T., Ćirković, P., Dimitrievska, A., Krstić, J., Mamužić, J., Marjanović, M., Popović, D. S., Sijacki, D. J., Simic, L. J., Vranješ, N.,& Vranješ Milosavljević, M.. (2015). Observation of top-quark pair production in association with a photon and measurement of the t(t)over-bar gamma production cross section in pp collisions at root s=7 TeV using the ATLAS detector. in Physical Review D, 91(7).
https://doi.org/10.1103/PhysRevD.91.072007

Aad G, Agatonović-Jovin T, Ćirković P, Dimitrievska A, Krstić J, Mamužić J, Marjanović M, Popović DS, Sijacki DJ, Simic LJ, Vranješ N, Vranješ Milosavljević M. Observation of top-quark pair production in association with a photon and measurement of the t(t)over-bar gamma production cross section in pp collisions at root s=7 TeV using the ATLAS detector. in Physical Review D. 2015;91(7).
doi:10.1103/PhysRevD.91.072007 .

Aad, G., Agatonović-Jovin, Tatjana, Ćirković, Predrag, Dimitrievska, A., Krstić, Jelena, Mamužić, Judita, Marjanović, M., Popović, D. S., Sijacki, D. J., Simic, L. J., Vranješ, Nenad, Vranješ Milosavljević, Marija, "Observation of top-quark pair production in association with a photon and measurement of the t(t)over-bar gamma production cross section in pp collisions at root s=7 TeV using the ATLAS detector" in Physical Review D, 91, no. 7 (2015),
https://doi.org/10.1103/PhysRevD.91.072007 . .

TY  - JOUR
AU  - Aad, G.
AU  - Borjanović, Iris
AU  - Božović-Jelisavčić, Ivanka
AU  - Agatonović-Jovin, Tatjana
AU  - Krstić, Jelena
AU  - Mamužić, Judita
AU  - Mudrinić, Mihajlo
AU  - Popović, D. S.
AU  - Reljić, D.
AU  - Sijacki, D. J.
AU  - Simić, Lj.
AU  - Vranješ, Nenad
AU  - Vranješ Milosavljević, Marija
AU  - Živković, Lada
PY  - 2012
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/4690
AB  - We present the results of a search for new, heavy particles that decay at a significant distance from their production point into a final state containing charged hadrons in association with a high-momentum muon. The search is conducted in a pp-collision data sample with a center-of-mass energy of 7 TeV and an integrated luminosity of 33 pb(-1) collected in 2010 by the ATLAS detector operating at the Large Hadron Collider. Production of such particles is expected in various scenarios of physics beyond the standard model. We observe no signal and place limits on the production cross-section of supersymmetric particles in an R-parity-violating scenario as a function of the neutralino lifetime. Limits are presented for different squark and neutralino masses, enabling extension of the limits to a variety of other models. (C) 2011 CERN. Published by Elsevier B.V. All rights reserved.
T2  - Physics Letters B
T1  - Search for displaced vertices arising from decays of new heavy particles in 7 TeV pp collisions at ATLAS
VL  - 707
IS  - 5
SP  - 478
EP  - 496
DO  - 10.1016/j.physletb.2011.12.057
ER  - 

@article{
author = "Aad, G. and Borjanović, Iris and Božović-Jelisavčić, Ivanka and Agatonović-Jovin, Tatjana and Krstić, Jelena and Mamužić, Judita and Mudrinić, Mihajlo and Popović, D. S. and Reljić, D. and Sijacki, D. J. and Simić, Lj. and Vranješ, Nenad and Vranješ Milosavljević, Marija and Živković, Lada",
year = "2012",
abstract = "We present the results of a search for new, heavy particles that decay at a significant distance from their production point into a final state containing charged hadrons in association with a high-momentum muon. The search is conducted in a pp-collision data sample with a center-of-mass energy of 7 TeV and an integrated luminosity of 33 pb(-1) collected in 2010 by the ATLAS detector operating at the Large Hadron Collider. Production of such particles is expected in various scenarios of physics beyond the standard model. We observe no signal and place limits on the production cross-section of supersymmetric particles in an R-parity-violating scenario as a function of the neutralino lifetime. Limits are presented for different squark and neutralino masses, enabling extension of the limits to a variety of other models. (C) 2011 CERN. Published by Elsevier B.V. All rights reserved.",
journal = "Physics Letters B",
title = "Search for displaced vertices arising from decays of new heavy particles in 7 TeV pp collisions at ATLAS",
volume = "707",
number = "5",
pages = "478-496",
doi = "10.1016/j.physletb.2011.12.057"
}

Aad, G., Borjanović, I., Božović-Jelisavčić, I., Agatonović-Jovin, T., Krstić, J., Mamužić, J., Mudrinić, M., Popović, D. S., Reljić, D., Sijacki, D. J., Simić, Lj., Vranješ, N., Vranješ Milosavljević, M.,& Živković, L.. (2012). Search for displaced vertices arising from decays of new heavy particles in 7 TeV pp collisions at ATLAS. in Physics Letters B, 707(5), 478-496.
https://doi.org/10.1016/j.physletb.2011.12.057

Aad G, Borjanović I, Božović-Jelisavčić I, Agatonović-Jovin T, Krstić J, Mamužić J, Mudrinić M, Popović DS, Reljić D, Sijacki DJ, Simić L, Vranješ N, Vranješ Milosavljević M, Živković L. Search for displaced vertices arising from decays of new heavy particles in 7 TeV pp collisions at ATLAS. in Physics Letters B. 2012;707(5):478-496.
doi:10.1016/j.physletb.2011.12.057 .

Aad, G., Borjanović, Iris, Božović-Jelisavčić, Ivanka, Agatonović-Jovin, Tatjana, Krstić, Jelena, Mamužić, Judita, Mudrinić, Mihajlo, Popović, D. S., Reljić, D., Sijacki, D. J., Simić, Lj., Vranješ, Nenad, Vranješ Milosavljević, Marija, Živković, Lada, "Search for displaced vertices arising from decays of new heavy particles in 7 TeV pp collisions at ATLAS" in Physics Letters B, 707, no. 5 (2012):478-496,
https://doi.org/10.1016/j.physletb.2011.12.057 . .

TY  - JOUR
AU  - Aad, G.
AU  - Borjanović, Iris
AU  - Božović-Jelisavčić, Ivanka
AU  - Agatonović-Jovin, Tatjana
AU  - Krstić, Jelena
AU  - Mamužić, Judita
AU  - Mudrinić, Mihajlo
AU  - Popović, D. S.
AU  - Reljić, D.
AU  - Sijacki, D. J.
AU  - Simic, L. J.
AU  - Vranješ, Nenad
AU  - Vranješ Milosavljević, Marija
AU  - Živković, Lada
PY  - 2012
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/4687
AB  - A measurement is presented of the cross section for the production of a W boson with one or two jets, of which at least one must be a b-jet, in pp collisions at root s = 7 TeV. Production via top decay is not included in the signal definition. The measurement is based on 35 pb(-1) of data collected with the ATLAS detector at the LHC. The W + b-jet cross section is defined for jets reconstructed with the anti-k(t) clustering algorithm with transverse momentum above 25 GeV and rapidity within +/-2.1. The b-jets are identified by reconstructing secondary vertices. The fiducial cross section is measured both for the electron and muon decay channel of the W boson and is found to be 10.2 +/- 1.9(stat) +/- 2.6(syst) pb for one lepton flavour. The results are compared with next-to-leading order QCD calculations, which predict a cross section smaller than, though consistent with, the measured value. (C) 2011 CERN. Published by Elsevier B.V. All rights reserved.
T2  - Physics Letters B
T1  - Measurement of the cross section for the production of a W boson in association with b-jets in pp collisions at root s=7 TeV with the ATLAS detector
VL  - 707
IS  - 5
SP  - 418
EP  - 437
DO  - 10.1016/j.physletb.2011.12.046
ER  - 

@article{
author = "Aad, G. and Borjanović, Iris and Božović-Jelisavčić, Ivanka and Agatonović-Jovin, Tatjana and Krstić, Jelena and Mamužić, Judita and Mudrinić, Mihajlo and Popović, D. S. and Reljić, D. and Sijacki, D. J. and Simic, L. J. and Vranješ, Nenad and Vranješ Milosavljević, Marija and Živković, Lada",
year = "2012",
abstract = "A measurement is presented of the cross section for the production of a W boson with one or two jets, of which at least one must be a b-jet, in pp collisions at root s = 7 TeV. Production via top decay is not included in the signal definition. The measurement is based on 35 pb(-1) of data collected with the ATLAS detector at the LHC. The W + b-jet cross section is defined for jets reconstructed with the anti-k(t) clustering algorithm with transverse momentum above 25 GeV and rapidity within +/-2.1. The b-jets are identified by reconstructing secondary vertices. The fiducial cross section is measured both for the electron and muon decay channel of the W boson and is found to be 10.2 +/- 1.9(stat) +/- 2.6(syst) pb for one lepton flavour. The results are compared with next-to-leading order QCD calculations, which predict a cross section smaller than, though consistent with, the measured value. (C) 2011 CERN. Published by Elsevier B.V. All rights reserved.",
journal = "Physics Letters B",
title = "Measurement of the cross section for the production of a W boson in association with b-jets in pp collisions at root s=7 TeV with the ATLAS detector",
volume = "707",
number = "5",
pages = "418-437",
doi = "10.1016/j.physletb.2011.12.046"
}

Aad, G., Borjanović, I., Božović-Jelisavčić, I., Agatonović-Jovin, T., Krstić, J., Mamužić, J., Mudrinić, M., Popović, D. S., Reljić, D., Sijacki, D. J., Simic, L. J., Vranješ, N., Vranješ Milosavljević, M.,& Živković, L.. (2012). Measurement of the cross section for the production of a W boson in association with b-jets in pp collisions at root s=7 TeV with the ATLAS detector. in Physics Letters B, 707(5), 418-437.
https://doi.org/10.1016/j.physletb.2011.12.046

Aad G, Borjanović I, Božović-Jelisavčić I, Agatonović-Jovin T, Krstić J, Mamužić J, Mudrinić M, Popović DS, Reljić D, Sijacki DJ, Simic LJ, Vranješ N, Vranješ Milosavljević M, Živković L. Measurement of the cross section for the production of a W boson in association with b-jets in pp collisions at root s=7 TeV with the ATLAS detector. in Physics Letters B. 2012;707(5):418-437.
doi:10.1016/j.physletb.2011.12.046 .

Aad, G., Borjanović, Iris, Božović-Jelisavčić, Ivanka, Agatonović-Jovin, Tatjana, Krstić, Jelena, Mamužić, Judita, Mudrinić, Mihajlo, Popović, D. S., Reljić, D., Sijacki, D. J., Simic, L. J., Vranješ, Nenad, Vranješ Milosavljević, Marija, Živković, Lada, "Measurement of the cross section for the production of a W boson in association with b-jets in pp collisions at root s=7 TeV with the ATLAS detector" in Physics Letters B, 707, no. 5 (2012):418-437,
https://doi.org/10.1016/j.physletb.2011.12.046 . .

TY  - JOUR
AU  - Aad, G.
AU  - Borjanović, Iris
AU  - Božović-Jelisavčić, Ivanka
AU  - Krstić, Jelena
AU  - Mamužić, Judita
AU  - Mudrinić, Mihajlo
AU  - Popović, D. S.
AU  - Reljić, D.
AU  - Sijacki, D. J.
AU  - Simić, Lj.
AU  - Vranješ, Nenad
AU  - Vranješ Milosavljević, Marija
AU  - Vudragovic, D.
AU  - Živković, Lada
PY  - 2010
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/4189
AB  - The first measurements from proton-proton collisions recorded with the ATLAS detector at the LHC are presented. Data were collected in December 2009 using a minimum-bias trigger during collisions at a centre-of-mass energy of 900 GeV. The charged-particle multiplicity, its dependence on transverse momentum and pseudorapidity, and the relationship between mean transverse momentum and charged-particle multiplicity are measured for events with at least one charged particle in the kinematic range vertical bar eta vertical bar LT 2.5 and p(T) GT 500 MeV. The measurements are compared to Monte Carlo models of proton-proton collisions and to results from other experiments at the same centre-of-mass energy. The charged-particle multiplicity per event and unit of pseudorapidity eta = 0 is measured to be 1.333 +/- 0.003(stat.) +/- 0.040(syst.), which is 5-15% higher than the Monte Carlo models predict. 2010 Published by Elsevier B.V.
T2  - Physics Letters B
T1  - Charged-particle multiplicities in pp interactions at root s=900 GeV measured with the ATLAS detector at the LHC ATLAS Collaboration
VL  - 688
IS  - 1
SP  - 21
EP  - 42
DO  - 10.1016/j.physletb.2010.03.064
ER  - 

@article{
author = "Aad, G. and Borjanović, Iris and Božović-Jelisavčić, Ivanka and Krstić, Jelena and Mamužić, Judita and Mudrinić, Mihajlo and Popović, D. S. and Reljić, D. and Sijacki, D. J. and Simić, Lj. and Vranješ, Nenad and Vranješ Milosavljević, Marija and Vudragovic, D. and Živković, Lada",
year = "2010",
abstract = "The first measurements from proton-proton collisions recorded with the ATLAS detector at the LHC are presented. Data were collected in December 2009 using a minimum-bias trigger during collisions at a centre-of-mass energy of 900 GeV. The charged-particle multiplicity, its dependence on transverse momentum and pseudorapidity, and the relationship between mean transverse momentum and charged-particle multiplicity are measured for events with at least one charged particle in the kinematic range vertical bar eta vertical bar LT 2.5 and p(T) GT 500 MeV. The measurements are compared to Monte Carlo models of proton-proton collisions and to results from other experiments at the same centre-of-mass energy. The charged-particle multiplicity per event and unit of pseudorapidity eta = 0 is measured to be 1.333 +/- 0.003(stat.) +/- 0.040(syst.), which is 5-15% higher than the Monte Carlo models predict. 2010 Published by Elsevier B.V.",
journal = "Physics Letters B",
title = "Charged-particle multiplicities in pp interactions at root s=900 GeV measured with the ATLAS detector at the LHC ATLAS Collaboration",
volume = "688",
number = "1",
pages = "21-42",
doi = "10.1016/j.physletb.2010.03.064"
}

Aad, G., Borjanović, I., Božović-Jelisavčić, I., Krstić, J., Mamužić, J., Mudrinić, M., Popović, D. S., Reljić, D., Sijacki, D. J., Simić, Lj., Vranješ, N., Vranješ Milosavljević, M., Vudragovic, D.,& Živković, L.. (2010). Charged-particle multiplicities in pp interactions at root s=900 GeV measured with the ATLAS detector at the LHC ATLAS Collaboration. in Physics Letters B, 688(1), 21-42.
https://doi.org/10.1016/j.physletb.2010.03.064

Aad G, Borjanović I, Božović-Jelisavčić I, Krstić J, Mamužić J, Mudrinić M, Popović DS, Reljić D, Sijacki DJ, Simić L, Vranješ N, Vranješ Milosavljević M, Vudragovic D, Živković L. Charged-particle multiplicities in pp interactions at root s=900 GeV measured with the ATLAS detector at the LHC ATLAS Collaboration. in Physics Letters B. 2010;688(1):21-42.
doi:10.1016/j.physletb.2010.03.064 .

Aad, G., Borjanović, Iris, Božović-Jelisavčić, Ivanka, Krstić, Jelena, Mamužić, Judita, Mudrinić, Mihajlo, Popović, D. S., Reljić, D., Sijacki, D. J., Simić, Lj., Vranješ, Nenad, Vranješ Milosavljević, Marija, Vudragovic, D., Živković, Lada, "Charged-particle multiplicities in pp interactions at root s=900 GeV measured with the ATLAS detector at the LHC ATLAS Collaboration" in Physics Letters B, 688, no. 1 (2010):21-42,
https://doi.org/10.1016/j.physletb.2010.03.064 . .