Probing anomalous $$tq\gamma $$ tqγ and tqg couplings via single top production in association with photon at FCC-hh

Abstract

Abstract We study the anomalous FCNC $$tq\gamma $$ tqγ and tqg couplings via $$pp\rightarrow Wb\gamma +X$$ pp→Wbγ+X signal process including realistic detector effects for both leptonic and hadronic decay channels of the W boson at 100 TeV FCC-hh. The relevant backgrounds are considered in the cut based analysis to obtain not only limits on the anomalous $$\lambda $$ λ and $$\zeta $$ ζ couplings but also branching ratios of $$t\rightarrow q\gamma $$ t→qγ and $$t\rightarrow qg$$ t→qg decay channels. We find that the sensitivity to the branching ratio of $$t \rightarrow q \gamma $$ t→qγ channel is three order better than the available LHC experimental limits, and it is comparable for the branching ratio of the $$t\rightarrow qg$$ t→qg decay channel with an integrated luminosity of 10 $$\text {ab}^{-1}$$ ab-1 at 2$$\sigma $$ σ significance level.