Please use this identifier to cite or link to this item: https://hdl.handle.net/20.500.11851/9542
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dc.contributor.authorAad, G.-
dc.contributor.authorAbbott, B.-
dc.contributor.authorAbdallah, J.-
dc.contributor.authorKhalek, S. Abdel-
dc.contributor.authorAbdinov, O.-
dc.contributor.authorAben, R.-
dc.contributor.authorAdelman, J.-
dc.date.accessioned2022-12-25T20:37:28Z-
dc.date.available2022-12-25T20:37:28Z-
dc.date.issued2015-
dc.identifier.issn2470-0010-
dc.identifier.issn2470-0029-
dc.identifier.urihttps://doi.org/10.1103/PhysRevD.91.072007-
dc.identifier.urihttps://hdl.handle.net/20.500.11851/9542-
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_US
dc.language.isoenen_US
dc.publisherAmer Physical Socen_US
dc.relation.ispartofPhysical Review Den_US
dc.rightsinfo:eu-repo/semantics/openAccessen_US
dc.subjectParton Distributionsen_US
dc.subjectMonte-Carloen_US
dc.subjectLhcen_US
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_US
dc.typeArticleen_US
dc.departmentESTÜen_US
dc.identifier.volume91en_US
dc.identifier.issue7en_US
dc.authoridNechaeva, Polina Y/0000-0002-5910-4117-
dc.authoridGarcia, Carmen/0000-0003-1625-7452-
dc.authoridCarquin, Edson/0000-0002-7863-1166-
dc.authoridDi Nardo, Roberto/0000-0003-1111-3783-
dc.authoridde la Torre Perez, Hector/0000-0002-4516-5269-
dc.authoridBarreiro, Fernando/0000-0002-3021-0258-
dc.authoridPásztor, Gabriella/0000-0003-0707-9762-
dc.identifier.wosWOS:000353545500001en_US
dc.identifier.scopus2-s2.0-84929089097en_US
dc.institutionauthor[Belirlenecek]-
dc.identifier.doi10.1103/PhysRevD.91.072007-
dc.authorwosidSalamon, Andrea/AGN-6159-2022-
dc.authorwosidNechaeva, Polina Y/N-1148-2015-
dc.authorwosidCarquin, Edson/G-5221-2015-
dc.authorwosidGarcia, Carmen/W-2465-2018-
dc.authorwosidDi Nardo, Roberto/J-4993-2012-
dc.authorwosidde la Torre Perez, Hector/ABG-6942-2020-
dc.authorwosidBarreiro, Fernando/D-9808-2012-
dc.authorscopusid26326745400-
dc.authorscopusid35226946900-
dc.authorscopusid16232226000-
dc.authorscopusid55443851900-
dc.authorscopusid6507496079-
dc.authorscopusid55336759900-
dc.authorscopusid26967479400-
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanen_US
dc.identifier.scopusqualityQ1-
dc.identifier.trdiziniden_US]
item.openairetypeArticle-
item.languageiso639-1en-
item.grantfulltextnone-
item.fulltextNo Fulltext-
item.openairecristypehttp://purl.org/coar/resource_type/c_18cf-
item.cerifentitytypePublications-
Appears in Collections:Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection
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