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High Energy Physics - Experiment

arXiv:1805.05784 (hep-ex)
[Submitted on 15 May 2018 (v1), last revised 19 Sep 2018 (this version, v2)]

Title:Search for top squarks decaying via four-body or chargino-mediated modes in single-lepton final states in proton-proton collisions at $\sqrt{s} =$ 13 TeV

Authors:CMS Collaboration
View a PDF of the paper titled Search for top squarks decaying via four-body or chargino-mediated modes in single-lepton final states in proton-proton collisions at $\sqrt{s} =$ 13 TeV, by CMS Collaboration
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Abstract:A search for the pair production of the lightest supersymmetric partner of the top quark ($\widetilde{\mathrm{t}}_1$) is presented. The search focuses on a compressed scenario where the mass difference between the top squark and the lightest supersymmetric particle, often considered to be the lightest neutralino ($\widetilde{\chi}^0_1$), is smaller than the mass of the W boson. The proton-proton collision data were recorded by the CMS experiment at a centre-of-mass energy of 13 TeV, and correspond to an integrated luminosity of 35.9 fb$^{-1}$. In this search, two decay modes of the top squark are considered: a four-body decay into a bottom quark, two additional fermions, and a $\widetilde{\chi}^0_1$; and a decay via an intermediate chargino. Events are selected using the presence of a high-momentum jet, significant missing transverse momentum, and a low transverse momentum electron or muon. Two analysis techniques are used, targeting different decay modes of the $\widetilde{\mathrm{t}}_1$: a sequential selection and a multivariate technique. No evidence for the production of top squarks is found, and mass limits at 95% confidence level are set that reach up to 560 GeV, depending on the $m(\widetilde{\mathrm{t}}_1) - m(\widetilde{\chi}^0_1)$ mass difference and the decay mode.
Comments: Replaced with the published version. Added the journal reference and the DOI. All the figures and tables can be found at this http URL (CMS Public Pages)
Subjects: High Energy Physics - Experiment (hep-ex)
Report number: CMS-SUS-17-005, CERN-EP-2018-079
Cite as: arXiv:1805.05784 [hep-ex]
  (or arXiv:1805.05784v2 [hep-ex] for this version)
  https://doi.org/10.48550/arXiv.1805.05784
arXiv-issued DOI via DataCite
Journal reference: JHEP 09 (2018) 065
Related DOI: https://doi.org/10.1007/JHEP09%282018%29065
DOI(s) linking to related resources

Submission history

From: The CMS Collaboration [view email]
[v1] Tue, 15 May 2018 14:09:53 UTC (609 KB)
[v2] Wed, 19 Sep 2018 13:10:42 UTC (609 KB)
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