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Search for supersymmetry in the all-hadronic final state using top quark tagging in pp collisions at sqrt(s) = 13 TeV

Preprint published in 2017 by Vardan Khachatryan, Albert M. Sirunyan, Martin Flechl, Markus Friedl, Rudolf Fruehwirth, Vasile Mihai Ghete, Christian Hartl, Natascha Hörmann, Josef Hrubec, Manfred Jeitler, Axel König, Vladimir Zykunov, Armen Tumasyan, Ilse Krätschmer, Dietrich Liko and other authors.
This paper is available in a repository.
This paper is available in a repository.

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Preprint: policy unknown
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Abstract

Submitted to Phys. Rev. D. All figures and tables can be found at http://cms-results.web.cern.ch/cms-results/public-results/publications/SUS-16-009 ; see paper for full list of authors ; A search is presented for supersymmetry in all-hadronic events with missing transverse momentum based on tagging of top quarks. The data sample corresponds to an integrated luminosity of 2.3 inverse femtobarns of proton-proton collisions at a center-of-mass energy of 13 TeV, collected with the CMS detector at the LHC. Search regions are defined using the properties of reconstructed jets, the presence of bottom and top quark candidates, and an imbalance in transverse momentum. With no statistically significant excess of events observed beyond the expected contributions from the standard model, we set exclusion limits at 95% confidence level on the masses of new particles in the context of simplified models of direct and gluino-mediated top squark production. For direct top squark production with decays to a top quark and a neutralino, top squark masses up to 740 GeV and neutralino masses up to 240 GeV are excluded. Gluino masses up to 1550 GeV and neutralino masses up to 900 GeV are excluded for models of gluino pair production where each gluino decays to a top-antitop quark pair and a neutralino.