Volume 364 - European Physical Society Conference on High Energy Physics (EPS-HEP2019) - Top and Electroweak Physics
Comparison of direct and indirect constraints on anomalous tWb couplings
A. Kozachuk
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Pre-published on: June 14, 2020
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Abstract
We analyze constraints on anomalous couplings of the $Wtb$ vertex. In particular, we look at scenarios when two of four possible couplings are allowed to vary from their Standard Model values and obtain corresponding indirect constraints from three channels in B-physics: $B_{d,s}-\bar{B}_{d,s}$ oscillations, inclusive decay $B\to X_s\gamma$ and inclusive decay $B\to X_s\ell^+\ell^-$. We compare our results with constraints of similar scenarios obtained from direct experimental study of the $Wtb$ vertex in the t-channel single top quark production cross section. We conclude that in most two-dimensional scenarios indirect constraints are more rigid. So far, no deviations from the Standard Model have been found.
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