Search for supersymmetry in proton-proton collisions at 13 TeV using identified top quarks search for supersymmetry in proton-proton ⋯ A. M. SIRUNYAN et al.

Sirunyan, A. M. and Tumasyan, A. R. and Adam, Wolfgang and Ambrogi, Federico and Asilar, Ece and Md. Ali, Mohd. Adli (2018) Search for supersymmetry in proton-proton collisions at 13 TeV using identified top quarks search for supersymmetry in proton-proton ⋯ A. M. SIRUNYAN et al. Physical Review D, 97 (1). pp. 1-29. ISSN 2470-0010 E-ISSN 2470-0029

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Abstract

A search for supersymmetry is presented based on proton-proton collision events containing identified hadronically decaying top quarks, no leptons, and an imbalance pmiss T in transverse momentum. The data were collected with the CMS detector at the CERN LHC at a center-of-mass energy of 13 TeV, and correspond to an integrated luminosity of 35.9 fb−1. Search regions are defined in terms of the multiplicity of bottom quark jet and top quark candidates, the pmiss T , the scalar sum of jet transverse momenta, and the mT2 mass variable. No statistically significant excess of events is observed relative to the expectation from the standard model. Lower limits on the masses of supersymmetric particles are determined at 95% confidence level in the context of simplified models with top quark production. For a model with direct top squark pair production followed by the decay of each top squark to a top quark and a neutralino, top squark masses up to 1020 GeVand neutralino masses up to 430 GeVare excluded. For a model with pair production of gluinos followed by the decay of each gluino to a top quark-antiquark pair and a neutralino, gluino masses up to 2040 GeV and neutralino masses up to 1150 GeV are excluded. These limits extend previous results.

Item Type:	Article (Journal)
Additional Information:	7861/65271
Uncontrolled Keywords:	Supersymmetry; Proton-proton collisions; 13 TeV; Top quarks
Subjects:	Q Science > Q Science (General) Q Science > QC Physics
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button):	Kulliyyah of Science Kulliyyah of Science > Department of Physics
Depositing User:	Dr Mohd Adli MD Ali
Date Deposited:	30 Jul 2018 15:30
Last Modified:	30 Jul 2018 15:30
URI:	http://irep.iium.edu.my/id/eprint/65271

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