KAI-FENG CHENRONG-SHYANG LUWEI-SHU HOU2022-04-252022-04-2520213702693https://www.scopus.com/inward/record.uri?eid=2-s2.0-85111238296&doi=10.1016%2fj.physletb.2021.136446&partnerID=40&md5=ef58efe63e43db679ab742b4f1222aa3https://scholars.lib.ntu.edu.tw/handle/123456789/606524A 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. ? 2021 The Author(s)CMS; Leptoquarks; Search for new physics;journal article10.1016/j.physletb.2021.1364462-s2.0-85111238296