2020/12/31 by A.M. Sirunyan, CMS Collaboration, A. Tumasyan +98
Physics and Astronomy · #Charge (physics) #Coupling (piping) #Dark Matter and Cosmic Phenomena #Electron #Fermion #Large Hadron Collider #Lepton #Leptoquark #Neutrino #Neutrino Physics Research #Nuclear physics #Particle physics #Particle physics theoretical and experimental studies #Physics #Physics beyond the Standard Model #Quark #Scalar (mathematics) #Standard Model (mathematical formulation) #hep-ex
paper · pdf · doi:10.1016/j.physletb.2021.136446
published as Phys. Lett. B 819 (2021) 136446 · Replaced with the published version. Added the journal reference. All the figures and tables can be found at http://cms-results.web.cern.ch/cms-results/public-results/publications/EXO-19-015 (CMS Public Pages)
openalex created_date 2020/12/21 · openalex publication_date 2021/06/10 · arxiv created 2021/06/19 · arxiv updated 2021/06/22 · openalex updated_date 2026/08/06
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 −1/3 e coupling to a top quark plus a tau lepton ( t τ ) or a bottom quark plus a neutrino ( b ν ), or a vector particle of charge +2/3 e , coupling to t ν or b τ . 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 t τ ν b and t τ ν 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.