科研之友
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摘要
We study the effect of anomalous Wtb couplings on the (B)overbar -> X(s)gamma branching ratio. The considered couplings are introduced as parts of gauge-invariant dimension-six operators that are built out of the standard model fields only. One-loop contributions from the charged-current vertices are assumed to be of the same order as the tree-level flavor-changing neutral current ones. Bounds on the corresponding Wilson coefficients are derived.
- 出版日期2008-10
