Top quark FCNC couplings at future circular hadron electron colliders

Abstract

A study of single top quark production via flavor changing neutral current interactions at $tq\gamma$ vertices is performed at future circular hadron electron collider. The signal cross sections for the processes $e^{-}p\to e^{-}{W}^{\pm }q+X$ and $e^{-}p\to e^{-}{W}^{\pm }bq+X$ in the collision of electron beam with energy $E_e=$ 60 GeV and proton beam with energy $E_p=$ 50 TeV are calculated. In the analysis, the invariant mass distributions of three jets reconstructing top quark mass, requiring one b-tagged jet and other two jets reconstructing the $W$ mass are used to count signal and background events after all selection cuts. The upper limits on the anomalous flavor changing neutral current $tq\gamma$ couplings are found to be ${\lambda }_q<$ 0.01 at future circular hadron electron collider for $L_{int}=100$ fb${}^{-1}$ with the fast simulation of detector effects. Signal significance depending on the couplings ${\lambda }_q$ is analyzed and an enhanced sensitivity is found to the branching ratio BR($t\to q\gamma$) at the future circular hadron electron collider when compared to the current experimental results.

11 pages, 4 Figures, 4 Tables, to appear in Phys. Rev. D

References in corpus (7)

• PYTHIA 6.4 Physics and Manual
• The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations
• Design of beam optics for the Future Circular Collider e+e- -collider rings
• Search for anomalous single top quark production in association with a photon in pp collisions at sqrt(s) = 8 TeV
• B -> Xsγconstraints on the top quark anomalous t-> cγcoupling
• Top reduced cross section behavior at the LHeC kinematic range
• Probing the Anomalous FCNC tqgamma Couplings at Large Hadron electron Collider

Cited by in corpus (11)

• Probing top quark FCNC couplings in the triple-top signal at the high energy LHC and future circular collider
• Constraining top quark flavor violation and dipole moments through three and four top quark productions at the LHC
• Exploring the Anomalous Top-Higgs FCNC Couplings at the electron proton colliders
• Top quark anomalous FCNC production via $tqg$ couplings at FCC-hh
• Probing anomalous $tq\gamma$ and $tqg$ couplings via single top production in association with photon at FCC-hh
• Probing Top Quark FCNC tqgamma and tqZ Couplings at Future Electron-Proton Colliders
• Probing the anomalous $tq\gamma$ couplings through single top production at the future lepton-hadron colliders
• Top cross section in the LHeC and FCC-he energy range
• Probing the anomalous tqgamma couplings in photon-proton collisions
• Top quark effective couplings from top-pair tagged photoproduction in $p{e}^{-}$ 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