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dc.creatorAad, G.
dc.creatorAgatonović-Jovin, Tatjana
dc.creatorĆirković, Predrag
dc.creatorDimitrievska, A.
dc.creatorKrstić, Jelena
dc.creatorMamužić, Judita
dc.creatorMarjanovic, M.
dc.creatorPopovic, D. S.
dc.creatorSijacki, D. J.
dc.creatorSimic, L. J.
dc.creatorVranjes, N.
dc.creatorVranješ Milosavljević, Marija
dc.date.accessioned2018-03-01T16:05:16Z
dc.date.available2018-03-01T16:05:16Z
dc.date.issued2015
dc.identifier.issn1550-7998 (print)
dc.identifier.issn1550-2368 (electronic)
dc.identifier.urihttp://vinar.vin.bg.ac.rs/handle/123456789/514
dc.description.abstractA 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.en
dc.relationANPCyT, Argentina, YerPhI, Armenia, ARC, Australia, BMWFW, Austria, FWF, Austria, ANAS, Azerbaijan, SSTC, Belarus, CNPq, Brazil, FAPESP, Brazil, NSERC, Canada, NRC, Canada, CFI, Canada, CERN, CONICYT, Chile, CAS, China, MOST, China, NSFC, China, COLCIENCIAS, Colombia, MSMT CR, Czech Republic, MPO CR, Czech Republic, VSC CR, Czech Republic, DNRF, Denmark, DNSRC, Denmark, Lundbeck Foundation, Denmark, EPLANET, European Union, ERC, European Union, NSRF, European Union, IN2P3-CNRS, France, CEA-DSM/IRFU, France, GNSF, Georgia, BMBF, Germany, DFG, Germany, HGF, Germany, MPG, Germany, AvH Foundation, Germany, GSRT, Greece, NSRF, Greece, RGC, China, Hong Kong SAR, China, ISF, Israel, MINERVA, Israel, GIF, Israel, I-CORE, Israel, Benoziyo Center, Israel, INFN, Italy, MEXT, Japan, JSPS, Japan, CNRST, Morocco, FOM, Netherlands, NWO, Netherlands, BRF, Norway, RCN, Norway, MNiSW, Poland, NCN, Poland, GRICES, Portugal, FCT, Portugal, MNE/IFA, Romania, MES of Russia, Russian Federation, NRC KI, Russian Federation, JINR, MSTD, Serbia, MSSR, Slovakia, ARRS, Slovenia, MIZS, Slovenia, DST/NRF, South Africa, MINECO, Spain, SRC, Sweden, Wallenberg Foundation, Sweden, SER, Switzerland, SNSF, Switzerland, Canton of Bern, Switzerland, Canton of Geneva, Switzerland, NSC, Taiwan, TAEK, Turkey, STFC, United Kingdom, Royal Society, United Kingdom, Leverhulme Trust, United Kingdom, DOE, United States of America, NSF, United States of America, ICREA
dc.rightsopenAccessen
dc.sourcePhysical Review Den
dc.titleObservation 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 detectoren
dc.typearticleen
dcterms.abstractЋирковић Предраг; Врањес, Н.; Aгатоновић-Јовин Татјана; Милосављевиц, М. Врањес; Марјановиц, М.; Крстиц, Ј.; Aад, Г.; Симиц, Л. Ј.; Поповиц, Д. С.; Мамузић Јудита; Сијацки, Д. Ј.; Димитриевска, A.;
dc.citation.volume91
dc.citation.issue7
dc.identifier.wos000353545500001
dc.identifier.doi10.1103/PhysRevD.91.072007
dc.citation.otherArticle Number: 072007
dc.citation.rankM21
dc.contributor.countATLAS Collaboration (ukupan broj autora: 2881)
dc.identifier.scopus2-s2.0-84929089097
dc.identifier.fulltexthttp://vinar.vin.bg.ac.rs//bitstream/id/13193/510.pdf


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