Search for anomalous production of events with three or more leptons in pp collisions at √s=8  TeV

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dc.citation.firstpage32006en_US
dc.citation.issueNumber3en_US
dc.citation.journalTitlePhysical Review Den_US
dc.citation.volumeNumber90en_US
dc.contributor.authorAdair, A.en_US
dc.contributor.authorAkgun, B.en_US
dc.contributor.authorEcklund, K.M.en_US
dc.contributor.authorGeurts, F.J.M.en_US
dc.contributor.authorLi, W.en_US
dc.contributor.authorMichlin, B.en_US
dc.contributor.authorPadley, B.P.en_US
dc.contributor.authorRedjimi, R.en_US
dc.contributor.authorRoberts, J.en_US
dc.contributor.authorZabel, J.en_US
dc.date.accessioned2015-09-02T21:19:52Z
dc.date.available2015-09-02T21:19:52Z
dc.date.issued2014en_US
dc.description.abstractA search for physics beyond the standard model in events with at least three leptons is presented. The data sample, corresponding to an integrated luminosity of 19.5  fb−1 of proton-proton collisions with center-of-mass energy √s=8  TeV, was collected by the CMS experiment at the LHC during 2012. The data are divided into exclusive categories based on the number of leptons and their flavor, the presence or absence of an opposite-sign, same-flavor lepton pair (OSSF), the invariant mass of the OSSF pair, the presence or absence of a tagged bottom-quark jet, the number of identified hadronically decaying τ leptons, and the magnitude of the missing transverse energy and of the scalar sum of jet transverse momenta. The numbers of observed events are found to be consistent with the expected numbers from standard model processes, and limits are placed on new-physics scenarios that yield multilepton final states. In particular, scenarios that predict Higgs boson production in the context of supersymmetric decay chains are examined. We also place a 95% confidence level upper limit of 1.3% on the branching fraction for the decay of a top quark to a charm quark and a Higgs boson (t→cH), which translates to a bound on the left- and right-handed top-charm flavor-violating Higgs Yukawa couplings, λHtc and λHct, respectively, of √|λHtc|2+|λHct|2−−−−−−−−−−−<0.21.en_US
dc.identifier.citationAdair, A., Akgun, B., Ecklund, K.M., et al.. "Search for anomalous production of events with three or more leptons in pp collisions at √s=8  TeV." <i>Physical Review D,</i> 90, no. 3 (2014) American Physical Society: 32006. http://dx.doi.org/10.1103/PhysRevD.90.032006.
dc.identifier.doihttp://dx.doi.org/10.1103/PhysRevD.90.032006en_US
dc.identifier.urihttps://hdl.handle.net/1911/81614
dc.language.isoengen_US
dc.publisherAmerican Physical Society
dc.rightsThis is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.en_US
dc.rights.urihttp://creativecommons.org/licenses/by/3.0/en_US
dc.titleSearch for anomalous production of events with three or more leptons in pp collisions at √s=8  TeVen_US
dc.typeJournal articleen_US
dc.type.dcmiTexten_US
dc.type.publicationpublisher versionen_US
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