Constraints on models of scalar and vector leptoquarks decaying to a quark and a neutrino at s =13 TeV

Sirunyan, A. M. and Tumasyan, A. R. and Adam, Wolfgang and Ambrogi, Federico and Asilar, Ece and Md. Ali, Mohd. Adli (2018) Constraints on models of scalar and vector leptoquarks decaying to a quark and a neutrino at s =13 TeV. Physical Review D, 98 (3). 032005-1. ISSN 2470-0010 E-ISSN 2470-0029

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Abstract

The results of a previous search by the CMS Collaboration for squarks and gluinos are reinterpreted to constrain models of leptoquark (LQ) production. The search considers jets in association with a transverse momentum imbalance, using the MT2 variable. The analysis uses proton-proton collision data at ffiffi s p ¼ 13 TeV, recorded with the CMS detector at the LHC in 2016 and corresponding to an integrated luminosity of 35.9 fb−1. Leptoquark pair production is considered with LQ decays to a neutrino and a top, bottom, or light quark. This reinterpretation considers higher mass values than the original CMS search to constrain both scalar and vector LQs. Limits on the cross section for LQ pair production are derived at the 95% confidence level depending on the LQ decay mode. A vector LQ decaying with a 50% branching fraction to tν, and 50% to bτ, has been proposed as part of an explanation of anomalous flavor physics results. In such a model, using only the decays to tν, LQ masses below 1530 GeV are excluded assuming the Yang-Mills case with coupling κ ¼ 1, or 1115 GeV in the minimal coupling case κ ¼ 0, placing the most stringent constraint to date from pair production of vector LQs.

Item Type:	Article (Journal)
Additional Information:	7861/69798
Uncontrolled Keywords:	Constraints on models; Scalar and vector; Leptoquarks decaying; Quark and a neutrino.
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:	17 Jan 2019 12:30
Last Modified:	15 Jul 2019 09:45
URI:	http://irep.iium.edu.my/id/eprint/69798

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