Probing tqZ anomalous couplings in the trilepton signal at the HL-LHC, HE-LHC, and FCC-hh *

نویسندگان

چکیده

Abstract We investigate the prospect of discovering Flavour Changing Neutral Current (FCNC) couplings via two production processes yielding trilepton signals: top quark pair pp\to t\bar{t} with one decaying to Z boson and light jet anomalous single plus process tZ . study these channels at various successors Large Hadron Collider (LHC), i.e., approved High-Luminosity LHC (HL-LHC) as well proposed High-Energy (HE-LHC) Future Circular in hadron-hadron mode (FCC-hh). perform a full simulation for signals relevant Standard Model (SM) backgrounds obtain limits on Branching Ratios (BRs) t\to qZ\; (q = u,c) , eventually final state through decay modes b W^{+}\to b\ell^{+}\nu_{\ell} Z\to \ell^{+}\ell^{-} The upper FCNC BRs 95% Confidence Level (CL) are obtained HL-LHC \sqrt s 14 TeV 3 ab ?1 HE-LHC 27 15 FCC-hh 100 30

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ژورنال

عنوان ژورنال: Chinese Physics C

سال: 2021

ISSN: ['1674-1137', '2058-6132']

DOI: https://doi.org/10.1088/1674-1137/abe0c0