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Search for supersymmetry in proton-proton collisions at 13 TeV using identified top quarks

Search for supersymmetry in proton-proton collisions at 13 TeV using identified top quarks
Search for supersymmetry in proton-proton collisions at 13 TeV using identified top quarks
A search for supersymmetry is presented based on proton-proton collision events containing identified hadronically decaying top quarks, no leptons, and an imbalance pmissT 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 pmissT, 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 GeV and neutralino masses up to 430 GeV are 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.
1550-7998
Belyaev, Alexander
6bdb9638-5ff9-4b65-a8f2-34bae3ac34b3
CMS Collaboration
Belyaev, Alexander
6bdb9638-5ff9-4b65-a8f2-34bae3ac34b3

Belyaev, Alexander , CMS Collaboration (2018) Search for supersymmetry in proton-proton collisions at 13 TeV using identified top quarks. Physical Review D, 97 (1). (doi:10.1103/PhysRevD.97.012007).

Record type: Article

Abstract

A search for supersymmetry is presented based on proton-proton collision events containing identified hadronically decaying top quarks, no leptons, and an imbalance pmissT 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 pmissT, 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 GeV and neutralino masses up to 430 GeV are 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.

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e-pub ahead of print date: 31 January 2018
Published date: January 2018

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Local EPrints ID: 418079
URI: https://eprints.soton.ac.uk/id/eprint/418079
ISSN: 1550-7998
PURE UUID: 2c7a555f-6521-417e-961b-3ef70ab61d97
ORCID for Alexander Belyaev: ORCID iD orcid.org/0000-0002-1733-4408

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Date deposited: 22 Feb 2018 17:30
Last modified: 06 Jun 2018 12:38

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Author: Alexander Belyaev ORCID iD

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