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dc.contributor.authorSirunyan, A. M.pt_BR
dc.contributor.authorSilveira, Gustavo Gil dapt_BR
dc.contributor.authorCMS Collaborationpt_BR
dc.date.accessioned2020-07-23T03:40:13Zpt_BR
dc.date.issued2020pt_BR
dc.identifier.issn0031-9007pt_BR
dc.identifier.urihttp://hdl.handle.net/10183/212326pt_BR
dc.description.abstractThe first search for supersymmetry in events with an experimental signature of one soft, hadronically decaying τ lepton, one energetic jet from initial-state radiation, and large transverse momentum imbalance is presented. These event signatures are consistent with direct or indirect production of scalar τ leptons ( ˜ τ ) in supersymmetric models that exhibit coannihilation between the ˜ τ and the lightest neutralino ( ˜ χ 0 1 ), and that could generate the observed relic density of dark matter. The data correspond to an integrated luminosity of 77.2     fb − 1 of proton-proton collisions at √ s = 13     TeV collected with the CMS detector at the LHC in 2016 and 2017. The results are interpreted in a supersymmetric scenario with a small mass difference ( Δ m ) between the chargino ( ˜ χ ± 1 ) or next-to-lightest neutralino ( ˜ χ 0 2 ), and the ˜ χ 0 1 . The mass of the ˜ τ is assumed to be the average of the ˜ χ ± 1 and ˜ χ 0 1 masses. The data are consistent with standard model background predictions. Upper limits at 95% confidence level are set on the sum of the ˜ χ ± 1 , ˜ χ 0 2 , and ˜ τ production cross sections for Δ m ( ˜ χ ± 1 , ˜ χ 0 1 ) = 50     GeV , resulting in a lower limit of 290 GeV on the mass of the ˜ χ ± 1 , which is the most stringent to date and surpasses the bounds from the LEP experiments.en
dc.format.mimetypeapplication/pdfpt_BR
dc.language.isoengpt_BR
dc.relation.ispartofPhysical review letters. Melville. Vol. 124, no. 4 (Jan. 2020), 041803, 19 p.pt_BR
dc.rightsOpen Accessen
dc.subjectAceleradores de partículaspt_BR
dc.subjectColisões proton-protonpt_BR
dc.subjectSupersimetriaspt_BR
dc.titleSearch for supersymmetry with a compressed mass spectrum in events with a soft τ lepton, a highly energetic jet, and large missing transverse momentum in proton-proton collisions at √s=13 TeVpt_BR
dc.typeArtigo de periódicopt_BR
dc.identifier.nrb001114673pt_BR
dc.type.originEstrangeiropt_BR


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