Branching Ratios of $B \to D_s K$ Decays in Perturbative QCD Approach

Details Branching Ratios of $B \to D_s K$ Decays in Perturbative QCD Approach Branching Ratios of $B \to D_s K$ Decays in Perturbative QCD Approach

2002-10-15

arxiv.org/abs/hep-ph/0210206v1

Eur.Phys.J.C28:305-312,2003

Physics

High Energy Physics

High Energy Physics - Phenomenology

18 pages, 3 figures

Scientific paper

10.1140/epjc/s2003-01150-4

The rare decays $B^0 \to D_s^- K^+$ and $B^+ \to D_s^+ \bar{K}^0$ can occur only via annihilation type diagrams in the standard model. We calculate these decays in perturbative QCD approach. We found that the calculated branching ratio of $B^0 \to D_s^- K^+$ agreed with the data which had been observed in the KEK and SLAC $B$ factories. While the decay $B^+ \to D_s^+ \bar{K}^0$ has a very small branching ratio at ${\cal O}(10^{-8})$, due to the suppression from CKM matrix elements $|V_{ub}^* V_{cd}|$.

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