B^+ --> D^{*+}_s gamma and B^+ --> D^{*+} gamma as Probes of V_{ub}

Abstract

The decays B^+ --> D^{*+}_s gamma and B^+ --> D^{*+} gamma can be used for an extraction of |V_{ub}|. When the b and c quarks are nearly degenerate the rate for these modes can be determined in terms of other observed rates, namely B\bar{B} mixing and D^* --> D gamma decay. To this end we introduce a novel application of heavy quark and flavor symmetries. Although somewhat unrealistic, this limit provides us with a first estimate of these rates.

10 pages, latex (revtex), 2 eps figures. Corrects numerical errors in branching fraction calculation

Cited by in corpus (8)

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• Measuring $|V_{ub}|$ with B$\to D_s^{+}{X}_u$ transitions
• Non-factorizable contribtion to $\overline{B_d^0}\to {\pi }^0{D}^0$
• Weak Radiative B Decays
• On the Decay Modes $\overline{B_{d,s}^0}\to \gamma D^{\ast 0}$
• On the color suppressed contribution to $\bar{B_{d}^0} \rightarrow \, π^0 π^{0}