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Analysis of events with b-jets and a pair of leptons of the same charge in $\mathit{pp}$ collisions at $\sqrt{s}=8$ TeV with the ATLAS detector

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Analysis of events with b-jets and a pair of leptons of the same charge in $\mathit{pp}$ collisions at $\sqrt{s}=8$ TeV with the ATLAS detector

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dc.contributor.author Pałka, Marek [SAP14007322] pl
dc.contributor.author Richter-Wąs, Elżbieta [SAP11013626] pl
dc.contributor.other Współautorami artykułu są członkowie ATLAS Collaboration w liczbie 2822 pl
dc.date.accessioned 2016-03-18T12:15:46Z
dc.date.available 2016-03-18T12:15:46Z
dc.date.issued 2015 pl
dc.identifier.issn 1126-6708 pl
dc.identifier.uri http://ruj.uj.edu.pl/xmlui/handle/item/22620
dc.language eng pl
dc.rights Udzielam licencji. Uznanie autorstwa 4.0 Międzynarodowa *
dc.rights.uri http://creativecommons.org/licenses/by/4.0/pl/legalcode *
dc.title Analysis of events with b-jets and a pair of leptons of the same charge in $\mathit{pp}$ collisions at $\sqrt{s}=8$ TeV with the ATLAS detector pl
dc.type JournalArticle pl
dc.abstract.en An analysis is presented of events containing jets including at least one b-tagged jet, sizeable missing transverse momentum, and at least two leptons including a pair of the same electric charge, with the scalar sum of the jet and lepton transverse momenta being large. A data sample with an integrated luminosity of 20.3 fb$^{−1}$ of pp collisions at $\sqrt{s}=8$ TeV recorded by the ATLAS detector at the Large Hadron Collider is used. Standard Model processes rarely produce these final states, but there are several models of physics beyond the Standard Model that predict an enhanced rate of production of such events; the ones considered here are production of vector-like quarks, enhanced four-top-quark production, pair production of chiral b′-quarks, and production of two positively charged top quarks. Eleven signal regions are defined; subsets of these regions are combined when searching for each class of models. In the three signal regions primarily sensitive to positively charged top quark pair production, the data yield is consistent with the background expectation. There are more data events than expected from background in the set of eight signal regions defined for searching for vector-like quarks and chiral b′-quarks, but the significance of the discrepancy is less than two standard deviations. The discrepancy reaches 2.5 standard deviations in the set of five signal regions defined for searching for four-top-quark production. The results are used to set 95% CL limits on various models. pl
dc.subject.en exotics pl
dc.subject.en lepton production pl
dc.subject.en hadron-hadron scattering pl
dc.subject.en beyond standard model pl
dc.subject.en vector-like quarks pl
dc.subject.en four-top-production pl
dc.subject.en chiral b’ pl
dc.subject.en same charge top pair pl
dc.description.volume 2015 pl
dc.description.number 10 pl
dc.description.publication 3,3 pl
dc.identifier.doi 10.1007/JHEP10(2015)150 pl
dc.identifier.eissn 1029-8479 pl
dc.title.journal The Journal of High Energy Physics pl
dc.contributor.institution The ATLAS collaboration pl
dc.language.container eng pl
dc.affiliation Wydział Fizyki, Astronomii i Informatyki Stosowanej : Instytut Fizyki im. Mariana Smoluchowskiego pl
dc.subtype Article pl
dc.identifier.articleid 150 pl
dc.rights.original CC-BY; otwarte czasopismo; ostateczna wersja wydawcy; w momencie opublikowania; 0; pl
dc.identifier.project ROD UJ / P pl
.pointsMNiSW [2015 A]: 40


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Udzielam licencji. Uznanie autorstwa 4.0 Międzynarodowa Except where otherwise noted, this item's license is described as Udzielam licencji. Uznanie autorstwa 4.0 Międzynarodowa