Fingerprinting the Top quark FCNC via anomalous $Ztq$ couplings at the LHeC

Abstract

A study of the top quark \emph{Flavour Changing Neutral Current} (FCNC) through $Z$-boson has been performed in the proposed future $e^{-}p$ collider for the energy, $E_{e(p)}=60(7000)$~GeV. We considered an effective theory where the anomalous FCNC couplings are of vector and tensor nature. The effect of these couplings is probed in the single top production along with the scattered electron. The polar angle $\theta$ of the electrons coming out of the primary vertex in association with the top quark polarization asymmetries constructed from the angular distribution of the secondary lepton arising from the top decay, allow to distinguish the Lorentz structure of the coupling. From a multi-parameter analysis, we obtain a reach of $\mathcal{O}(10^{-2})$ in the case of $Ztu$ and $Ztc$ couplings at an integrated luminosity of 2~ab${}^{-1}$ at 95\% C.L.

arXiv comment8 pages, 12 figures, Acknowledgement, 26 references

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Cited by in corpus (14)

• The Large Hadron-Electron Collider at the HL-LHC
• Breaking down the entire spectrum of spin correlations of a pair of particles involving fermions and gauge bosons
• Probing top quark FCNC couplings in the triple-top signal at the high energy LHC and future circular collider
• Unravelling the anomalous gauge boson couplings in $Z{W}^{\pm }$ production at the LHC and the role of spin-$1$ polarizations
• Probing tqZ anomalous couplings in the trilepton signal at the HL-LHC, HE-LHC and FCC-hh
• Contributions to $ZZ{V}^{\ast }$ ($V=\gamma ,Z,Z^{\prime }$) couplings from $CP$ violating flavor changing couplings
• Probing the anomalous triple gauge boson couplings in $e^{+}{e}^{-}\to W^{+}{W}^{-}$ using $W$ polarizations with polarized beams
• Flavour-changing neutral scalar interactions of the top quark
• An Experiment for Electron-Hadron Scattering at the LHC
• On two-body and three-body spin correlations in leptonic $t\bar{t}Z$ production and anomalous couplings at the LHC
• Non-diagonal contributions to $Z\gamma V^{\ast }$ vertex, polarizations and bounds on $Z\overline{t}q$ couplings
• Explaining the $b\to s{\ell }^{+}{\ell }^{-}$ anomalies in $Z^{\prime }$ scenarios with top-FCNC couplings
• Study of anomalous gauge boson self-couplings and the role of spin-$1$ polarizations
• Analyzing $t\bar{t}Z$-couplings at the future $e^{-}p$ collider