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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
 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