Abstract
We look at anomalous interactions of the Wtb vertex. In case of the scenarios, when two of the four anomalous couplings can have non-SM values, we obtain constraints from three processes involving B-decays: Bd,s − B−d,s oscillations, the decay B → Xsγ and the decay B → Xsℓ+ℓ−. We only consider scenarios when two of the four anomalous couplings are allowed to have values different from thosein the Standard Model. We then compare our results with constraints from the t-channel single top quarkproduction cross section from [1], which were obtained for the same scenarios.
Highlights
Of all elementary particles the top quark is known for its largest mass and shortest decay time and is expected to have large couplings with unknown physics beyond the Standard Model (SM)
These estimations come from the processes with a B-meson in the initial state, when the Wtb interaction is presented in the loops
It is possible to constrain the values of the couplings using data from direct experimental studies of the Wtb vertex
Summary
Of all elementary particles the top quark is known for its largest mass and shortest decay time and is expected to have large couplings with unknown physics beyond the Standard Model (SM). The most stringent constraints on these couplings were obtained for the scenarios when only one coupling of the four was allowed to have non-SM values [3, 4] These estimations come from the processes with a B-meson in the initial state, when the Wtb interaction is presented in the loops. It is possible to constrain the values of the couplings using data from direct experimental studies of the Wtb vertex. In this work we analyzed scenarios with two non-SM couplings and obtained constraints from three channels in B-physics (Bd,s − Bd,s oscillations, the inclusive decay B → Xsγ and the inclusive decay B → Xs + −) and compared them to similar results from the t-channel single top quark production [1]
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