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Search for top squarks in final states with one isolated lepton, jets, and missing transverse momentum in s√=13  TeV pp collisions with the ATLAS detector

dc.contributor.authorAad, G. et al. (ATLAS Collaboration)
dc.date.accessioned2016-09-26T07:01:14Z
dc.date.available2016-09-26T07:01:14Z
dc.date.issued2016
dc.relation.ISSN2470-0029
dc.identifier.urihttp://resolver.sub.uni-goettingen.de/purl?gs-1/13733
dc.description.abstractThe results of a search for the top squark, the supersymmetric partner of the top quark, in final states with one isolated electron or muon, jets, and missing transverse momentum are reported. The search uses the 2015 LHC pp collision data at a center-of-mass energy of ffiffiffi sp ¼ 13 TeV recorded by the ATLAS detector and corresponding to an integrated luminosity of 3.2 fb−1. The analysis targets two types of signal models: gluino-mediated pair production of top squarks with a nearly mass-degenerate top squark and neutralino and direct pair production of top squarks, decaying to the top quark and the lightest neutralino. The experimental signature in both signal scenarios is similar to that of a top quark pair produced in association with large missing transverse momentum. No significant excess over the Standard Model background prediction is observed, and exclusion limits on gluino and top squark masses are set at 95% confidence level. The results extend the LHC run-1 exclusion limit on the gluino mass up to 1460 GeV in the gluino-mediated scenario in the high gluino and low top squark mass region and add an excluded top squark mass region from 745 to 780 GeV for the direct top squark model with a massless lightest neutralino. The results are also reinterpreted to set exclusion limits in a model of vectorlike top quarks.
dc.language.isoeng
dc.relationinfo:eu-repo/grantAgreement/EC/FP7/246806/EU/European Particle physics Latin American NETwork/EPLANET
dc.rightsopenAccess
dc.rights.urihttps://creativecommons.org/licenses/by/3.0/
dc.subjecttop squarks; isolated lepton; pp collisions; ATLAS detector
dc.subject.ddc530
dc.titleSearch for top squarks in final states with one isolated lepton, jets, and missing transverse momentum in s√=13  TeV pp collisions with the ATLAS detector
dc.typejournalArticle
dc.identifier.doi10.1103/PhysRevD.94.052009
dc.type.versionpublishedVersion
dc.bibliographicCitation.volume94
dc.type.subtypejournalArticle
dc.bibliographicCitation.articlenumber052009
dc.notes.interninfo:eu-repo/grantAgreement/EC/H2020/643410/EU//OpenAIRE2020
dc.relation.euprojectEPLANET
dc.description.statusunReviewed
dc.bibliographicCitation.journalPhysical Review D


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