Combined searches for the production of supersymmetric top quark partners in proton-proton collisions at root s=13 TeV

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http://hdl.handle.net/10138/336714

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The CMS Collaboration , Tumasyan , A , Adam , W , Eerola , P , Forthomme , L , Kirschenmann , H , Österberg , K , Voutilainen , M , Bharthuar , S , Brücken , E , Garcia , F , Havukainen , J , Heikkilä , J , Kim , M , Kinnunen , R , Lampén , T , Lassila-Perini , K , Laurila , S , Lehti , S , Lindén , T , Lotti , M , Luukka , P , Martikainen , L , Myllymäki , M E J , Ott , J , Pekkanen , J , Siikonen , H , Tuominen , E , Tuominiemi , J , Viinikainen , J , Petrow , H & Tuuva , T 2021 , ' Combined searches for the production of supersymmetric top quark partners in proton-proton collisions at root s=13 TeV ' , European Physical Journal C. Particles and Fields , vol. 81 , no. 11 , 970 . https://doi.org/10.1140/epjc/s10052-021-09721-5

Title: Combined searches for the production of supersymmetric top quark partners in proton-proton collisions at root s=13 TeV
Author: The CMS collaboration; Tumasyan, A.; Adam, W.; Eerola, P.; Forthomme, Laurent; Kirschenmann, H.; Österberg, K.; Voutilainen, M.; Bharthuar, Shudhashil; Brücken, Erik; Garcia, F.; Havukainen, J.; Heikkilä, Jaana; Kim, Minsuk; Kinnunen, R.; Lampén, T.; Lassila-Perini, K.; Laurila, S.; Lehti, S.; Lindén, T.; Lotti, Mikko; Luukka, P.; Martikainen, Laura; Myllymäki, Mikael Erkki Johannes; Ott, Jennifer; Pekkanen, Juska; Siikonen, H.; Tuominen, E.; Tuominiemi, J.; Viinikainen, Jussi; Petrow, H.; Tuuva, T.
Contributor: University of Helsinki, Department of Physics
University of Helsinki, Department of Physics
University of Helsinki, Department of Physics
University of Helsinki, Department of Physics
University of Helsinki, Department of Physics
University of Helsinki, Helsinki Institute of Physics
University of Helsinki, Helsinki Institute of Physics
University of Helsinki, Helsinki Institute of Physics
University of Helsinki, Helsinki Institute of Physics
University of Helsinki, Universität Zürich
University of Helsinki, Helsinki Institute of Physics
University of Helsinki, Helsinki Institute of Physics
University of Helsinki, Helsinki Institute of Physics
University of Helsinki, Helsinki Institute of Physics
University of Helsinki, CERN, European Organization for Nuclear Research
University of Helsinki, Helsinki Institute of Physics
University of Helsinki, Helsinki Institute of Physics
University of Helsinki, Helsinki Institute of Physics
University of Helsinki, Lappeenranta University of Technology
University of Helsinki, Helsinki Institute of Physics
University of Helsinki, Helsinki Institute of Physics
University of Helsinki, Helsinki Institute of Physics
University of Helsinki, State University of New York at Buffalo
University of Helsinki, Helsinki Institute of Physics
University of Helsinki, Helsinki Institute of Physics
University of Helsinki, Helsinki Institute of Physics
University of Helsinki, University of Illinois at Chicago
Date: 2021-11-03
Language: eng
Number of pages: 35
Belongs to series: European Physical Journal C. Particles and Fields
ISSN: 1434-6044
URI: http://hdl.handle.net/10138/336714
Abstract: A combination of searches for top squark pair production using proton-proton collision data at a center-of-mass energy of 13 TeV at the CERN LHC, corresponding to an integrated luminosity of 137 fb(-1) collected by the CMS experiment, is presented. Signatures with at least 2 jets and large missing transverse momentum are categorized into events with 0, 1, or 2 leptons. New results for regions of parameter space where the kinematical properties of top squark pair production and top quark pair production are very similar are presented. Depending on themodel, the combined result excludes a top squarkmass up to 1325 GeV for amassless neutralino, and a neutralinomass up to 700 GeV for a top squarkmass of 1150 GeV. Top squarks with masses from 145 to 295 GeV, for neutralino masses from 0 to 100 GeV, with a mass difference between the top squark and the neutralino in a window of 30 GeV around the mass of the top quark, are excluded for the first time with CMS data. The results of theses searches are also interpreted in an alternative signal model of dark matter production via a spin-0 mediator in association with a top quark pair. Upper limits are set on the cross section for mediator particle masses of up to 420 GeV.
Subject: 114 Physical sciences
DARK-MATTER
SQUARK
MODEL
CANDIDATES
EXTENSION
VIOLATION
INVARIANT
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