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arXiv · hep-ph/0606065

Weak Radiative B Decays

Oleg Antipin·G. Valencia
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Abstract

We study the (tree-level) weak radiative decays of $B$ mesons. We present a numerical estimate for the inclusive $b \to X_c γ(γ)$ modes based on the free-quark decay. We then review what is known for the $B \to D^\star γ$ modes in the framework of heavy quark effective theory and chiral perturbation theory. Finally, we extend these ideas to the double radiative decay modes $B \to D γγ$. We find that the $b \to X_c γγ$ rate is about an order of magnitude larger than the corresponding $b \to X_s γγ$ rate. We also find the branching ratio for the $B \to D γγ$ mode with most favorable CKM angles at the few $\times10^{-8}$ level, comparable to predictions for $B \to K γγ$.

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Oleg Antipin, G. Valencia. 2006-08-24. Weak Radiative B Decays. https://doi.org/10.1103/physrevd.74.054015

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