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arxiv: 1811.01074 · v2 · pith:OKDARHRTnew · submitted 2018-11-02 · ✦ hep-ph

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

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

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