Re-enumeration of dimension-six SM operators yields 59 independent terms (15+19+25) when baryon number is conserved, versus 80 previously.
Anomalous Wtb coupling effects in the weak radiative B-meson decay
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abstract
We study the effect of anomalous Wtb couplings on the B -> Xs 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 flavour-changing neutral current ones. Bounds on the corresponding Wilson coefficients are derived.
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Dimension-Six Terms in the Standard Model Lagrangian
Re-enumeration of dimension-six SM operators yields 59 independent terms (15+19+25) when baryon number is conserved, versus 80 previously.