Search for singly and pair-produced leptoquarks coupling to third-generation fermions in proton-proton collisions at √s=13TeV

Search for singly and pair-produced leptoquarks coupling to third-generation fermions in proton-proton collisions at √s=13TeV

Bibliographische Detailangaben
Parent link:Physics Letters B
Vol. 819.— 2021.— [136446, 27 p.]
Körperschaft: Национальный исследовательский Томский политехнический университет Исследовательская школа физики высокоэнергетических процессов
Weitere Verfasser: Sirunyan А. М., Tumasyan A. R., Adam W. Wolfgang, Tyurin N. E. Nikolay Evgenjevich, Babaev A. A. Anton Anatoljevich, Okhotnikov V. V. Vitaly Vladimirovich, Sukhikh L. G. Leonid Grigorievich
Zusammenfassung:Title screen
A search for leptoquarks produced singly and in pairs in proton-proton collisions is presented. We consider the leptoquark (LQ) to be a scalar particle of charge −1/3e coupling to a top quark plus a tau lepton (tτ) or a bottom quark plus a neutrino (bν), or a vector particle of charge +2/3e, coupling to tν or bτ. These choices are motivated by models that can explain a series of anomalies observed in the measurement of B meson decays. In this analysis the signatures tτνb and tτν are probed, using data recorded by the CMS experiment at the CERN LHC at √s =13 TeV and that correspond to an integrated luminosity of 137 fb−1. These signatures have not been previously explored in a dedicated search. The data are found to be in agreement with the standard model prediction. Lower limits at 95% confidence level are set on the LQ mass in the range 0.98-1.73 TeV, depending on the LQ spin and its coupling λ to a lepton and a quark, and assuming equal couplings for the two LQ decay modes considered. These are the most stringent constraints to date on the existence of leptoquarks in this scenario.
Sprache:Englisch
Veröffentlicht: 2021
Schlagworte:
электронный ресурс
труды учёных ТПУ
CMS
search for new physics
leptoquarks
Online-Zugang:http://earchive.tpu.ru/handle/11683/72505
https://doi.org/10.1016/j.physletb.2021.136446
Format: Elektronisch Buchkapitel
KOHA link:https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=667008

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