Search for Lepton-Flavour-Violating Decays of the Higgs and Z Bosons with the ATLAS Detector

dc.contributor.VIAF250674117 (Izen, JM)en_US
dc.contributor.authorAaboud, M.en_US
dc.contributor.authorAad, G.en_US
dc.contributor.authorAbbott, B.en_US
dc.contributor.authorAbdinov, O.en_US
dc.contributor.authorAbeloos, B.en_US
dc.contributor.authorAbidi, S. H.en_US
dc.contributor.authorAbouZeid, O. S.en_US
dc.contributor.authorIzen, Joseph M.en_US
dc.contributor.authorMeirose, Bernharden_US
dc.contributor.authorReeves, Kendallen_US
dc.contributor.authorATLAS Collaborationen_US
dc.contributor.utdAuthorIzen, Joseph M.en_US
dc.contributor.utdAuthorMeirose, Bernharden_US
dc.contributor.utdAuthorReeves, Kendallen_US
dc.date.accessioned2018-05-15T19:51:27Z
dc.date.available2018-05-15T19:51:27Z
dc.date.created2017-09-19en_US
dc.date.issued2018-05-15
dc.description.abstractA search for new phenomena in final states characterized by high jet multiplicity, an isolated lepton (electron or muon) and either zero or at least three b-tagged jets is presented. The search uses 36.1 fb⁻¹ of √s̅ = 13 TeV proton-proton collision data collected by the ATLAS experiment at the Large Hadron Collider in 2015 and 2016. The dominant sources of background are estimated using parameterized extrapolations, based on observables at medium jet multiplicity, to predict the b-tagged jet multiplicity distribution at the higher jet multiplicities used in the search. No significant excess over the Standard Model expectation is observed and 95% confidence-level limits are extracted constraining four simplified models of R-parity-violating supersymmetry that feature either gluino or top-squark pair production. The exclusion limits reach as high as 2.1TeV in gluino mass and 1.2TeV in top-squark mass in the models considered. In addition, an upper limit is set on the cross-section for Standard Model tt̅tt̅ production of 60 fb (6.5 x the Standard Model prediction) at 95% confidence level. Finally, model-independent limits are set on the contribution from new phenomena to the signal-region yields.en_US
dc.description.departmentSchool of Natural Sciences and Mathematicsen_US
dc.identifier.bibliographicCitationAaboud, M., A. Collaboration, G. Aad, B. Abbott, et al. 2017. "Search for new phenomena in a lepton plus high jet multiplicity final state the ATLAS experiment using √s̅ = 13 TeV proton-proton collision data." Journal of High Energy Physics 9(88), doi:10.1007/jhep09(2017)088en_US
dc.identifier.issn1029-8479en_US
dc.identifier.issue88en_US
dc.identifier.urihttp://hdl.handle.net/10735.1/5741
dc.identifier.volume9en_US
dc.language.isoenen_US
dc.publisherSpringeren_US
dc.relation.urihttp://dx.doi.org/10.1007/jhep09(2017)088
dc.rightsCC BY 4.0 (Attribution)en_US
dc.rights©2017 The Authorsen_US
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/en_US
dc.sourceJournal of High Energy Physics
dc.subjectHadron collidersen_US
dc.subjectPartonsen_US
dc.subjectProton-proton interactionsen_US
dc.subjectLeptons (Nuclear physics)en_US
dc.subjectJets (Nuclear physics)en_US
dc.subjectStandard model (Nuclear physics)en_US
dc.titleSearch for Lepton-Flavour-Violating Decays of the Higgs and Z Bosons with the ATLAS Detectoren_US
dc.type.genrearticleen_US

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