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Title: | Search for singly and pair-produced leptoquarks coupling to third-generation fermions in proton-proton collisions at √s=13TeV |
Authors: | Sirunyan, А. М. Tumasyan, A. R. Adam, Wolfgang Tyurin, Nikolay Evgenjevich Babaev, Anton Anatoljevich Okhotnikov, Vitaly Vladimirovich Sukhikh, Leonid Grigorievich |
Keywords: | CMS; search for new physics; leptoquarks |
Issue Date: | 2021 |
Publisher: | Elsevier |
Citation: | Search for singly and pair-produced leptoquarks coupling to third-generation fermions in proton-proton collisions at √s=13TeV / А. М. Sirunyan, A. R. Tumasyan, W. Adam [et al.] // Physics Letters B. — 2021. — Vol. 819. — [136446, 27 p.]. |
Abstract: | 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. |
URI: | http://earchive.tpu.ru/handle/11683/72505 |
Appears in Collections: | Репринты научных публикаций |
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reprint-nw-38212.pdf | 1,34 MB | Adobe PDF | View/Open |
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