Probing Top Quark FCNC tqgamma and tqZ Couplings at Future Electron-Proton Colliders

Abstract

The top quark flavor changing neutral current (FCNC) processes are extremely suppressed within the Standard Model (SM) of particle physics. However, they could be enhanced in a new physics model Beyond the Standard Model (BSM). The top quark FCNC interactions would be a good test of new physics at present and future colliders. Within the framework of the BSM models, these interactions can be described by an effective Lagrangian. In this work, we study tqgamma and tqZ effective FCNC interaction vertices through the process e-p->e-Wq+X at future electron proton colliders, projected as Large Hadron electron Collider (LHeC) and Future Circular Collider-hadron electron (FCC-he). The cross sections for the signal have been calculated for different values of parameters lambda_q for tqgamma vertices and kappa_q for $tqZ$ vertices. Taking into account the relevant background we estimate the attainable range of signal parameters as a function of the integrated luminosity and present contour plots of couplings for different significance levels including detector simulation.

16 pages, 10 figures

References in corpus (4)

• PYTHIA 6.4 Physics and Manual
• A global approach to top-quark flavor-changing interactions
• Top quark FCNC couplings at future circular hadron electron colliders
• Ultraboosted $Zt$ and $\gamma t$ production at the HL-LHC and FCC-hh

Cited by in corpus (9)

• The Large Hadron-Electron Collider at the HL-LHC
• Probing tqZ anomalous couplings in the trilepton signal at the HL-LHC, HE-LHC and FCC-hh
• Top quark anomalous FCNC production via $tqg$ couplings at FCC-hh
• Fingerprinting the Top quark FCNC via anomalous $Ztq$ couplings at the LHeC
• Flavour-changing neutral scalar interactions of the top quark
• Top FCNC interactions through dimension six four-fermion operators at the electron proton collider
• Flavour-changing top quark decays in the alternative left-right model
• Probing the anomalous tqgamma couplings in photon-proton collisions
• Sensitivity analysis for the anomalous $tq\gamma$ couplings via $\gamma q\to t\gamma$ subprocess in photon-proton collisions at the FCC-$\mu$p