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dc.contributorCMS Collaboration
dc.creatorSirunyan, A.M.
dc.creatorTumasyan, A.
dc.creatorAdam, W.
dc.creatorAmbrogi, F.
dc.creatorBergauer, T.
dc.creatorAdžić, Petar
dc.creatorĆirković, Predrag
dc.creatorDevetak, Damir
dc.creatorĐorđević, Miloš
dc.creatorMilenović, Predrag
dc.creatorMilošević, Jovan
dc.creatorStojanović, Milan
dc.date.accessioned2020-11-03T08:51:31Z
dc.date.available2020-11-03T08:51:31Z
dc.date.issued2020
dc.identifier.urihttps://vinar.vin.bg.ac.rs/handle/123456789/8841
dc.description.abstractA measurement of the production cross section of top quark pairs in association with two b jets (tt‾bb‾) is presented using data collected in proton-proton collisions at s=13 TeV by the CMS detector at the LHC corresponding to an integrated luminosity of 35.9 fb−1. The cross section is measured in the all-jet decay channel of the top quark pair by selecting events containing at least eight jets, of which at least two are identified as originating from the hadronization of b quarks. A combination of multivariate analysis techniques is used to reduce the large background from multijet events not containing a top quark pair, and to help discriminate between jets originating from top quark decays and other additional jets. The cross section is determined for the total phase space to be 5.5±0.3(stat)−1.3+1.6(syst)pb and also measured for two fiducial tt‾bb‾ definitions. The measured cross sections are found to be larger than theoretical predictions by a factor of 1.5–2.4, corresponding to 1–2 standard deviations.en
dc.language.isoen
dc.rightsopenAccess
dc.sourcePhysics Letters B
dc.titleMeasurement of the tt-bb- production cross section in the all-jet final state in pp collisions at √s=13 TeVen
dc.typearticleen
dc.rights.licenseBY
dcterms.abstractСтојановић, Милан; Сирунyан, A.М.; Тумасyан, A.; Aджић, Петар; Ћирковић, Предраг; Деветак, Дамир; Ђорђевић, Милош; Aдам, W.; Aмброги, Ф.; Бергауер, Т.; Миленовић, Предраг; Милошевић, Јован;
dc.rights.holder© 2020, The Author(s)
dc.citation.volume803 C
dc.citation.spage135285
dc.identifier.wos000521730300041
dc.identifier.doi10.1016/j.physletb.2020.135285
dc.description.otherCMS Collaboration (ukupan broj autora: 2335)
dc.type.versionpublishedVersion
dc.identifier.scopus2-s2.0-85080887360
dc.identifier.fulltexthttp://vinar.vin.bg.ac.rs/bitstream/id/22168/1-s2.0-S0370269320300897-main.pdf


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