Search for vector-like quarks in events with two oppositely charged leptons and jets in proton-proton collisions at root s=13TeV

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The CMS Collaboration , Sirunyan , A M , Eerola , P , Kirschenmann , H , Pekkanen , J , Voutilainen , M , Havukainen , J , Heikkilä , J K , Järvinen , T , Karimäki , V , Kinnunen , R , Lampén , T , Lassila-Perini , K , Laurila , S , Lehti , S , Lindén , T , Luukka , P , Mäenpää , T , Siikonen , H , Tuominen , E , Tuominiemi , J & Tuuva , T 2019 , ' Search for vector-like quarks in events with two oppositely charged leptons and jets in proton-proton collisions at root s=13TeV ' , European Physical Journal C. Particles and Fields , vol. 79 , no. 4 , 364 . https://doi.org/10.1140/epjc/s10052-019-6855-8

Title: Search for vector-like quarks in events with two oppositely charged leptons and jets in proton-proton collisions at root s=13TeV
Author: The CMS collaboration; Sirunyan, A. M.; Eerola, P.; Kirschenmann, H.; Pekkanen, J.; Voutilainen, M.; Havukainen, J.; Heikkilä, J. K.; Järvinen, T.; Karimäki, V.; Kinnunen, R.; Lampén, T.; Lassila-Perini, K.; Laurila, S.; Lehti, S.; Lindén, T.; Luukka, P.; Mäenpää, T.; Siikonen, H.; Tuominen, E.; Tuominiemi, J.; Tuuva, T.
Contributor organization: Department of Physics
Helsinki Institute of Physics
Date: 2019-04-26
Language: eng
Number of pages: 31
Belongs to series: European Physical Journal C. Particles and Fields
ISSN: 1434-6044
DOI: https://doi.org/10.1140/epjc/s10052-019-6855-8
URI: http://hdl.handle.net/10138/302216
Abstract: A search for the pair production of heavy vector-like partners T and B of the top and bottom quarks has been performed by the CMS experiment at the CERN LHC using proton-proton collisions at . The data sample was collected in 2016 and corresponds to an integrated luminosity of 35.9 production include those where one of the T quarks decays via TtZ and the other via TbW, tZ, or tH, where H is a Higgs boson. For the BB case, final states include those where one of the B quarks decays via BbZ and the other BtW, bZ, or bH. Events with two oppositely charged electrons or muons, consistent with coming from the decay of a Z boson, and jets are investigated. The number of observed events is consistent with standard model background estimations. Lower limits at 95% confidence level are placed on the masses of the T and B quarks for a range of branching fractions. Assuming 100% branching fractions for TtZ, and BbZ, T and B quark mass values below 1280 and 1130 respectively, are excluded.
Subject: 114 Physical sciences
PHYSICS
BOSON
MASS
Peer reviewed: Yes
Rights: cc_by
Usage restriction: openAccess
Self-archived version: publishedVersion


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