Branching ratios of \(B \to D_s K\) decays in perturbative QCD approach

  • C.-D. Lü
  • K. Ukai
Theoretical Physics


The rare decays \(B^0 \to D_s^- K^+\) and \(B^+ \to D_s^+ \overline{K}^0\) can occur only via annihilation type diagrams in the standard model. We calculate these decays in the 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. The decay \(B^+ \to D_s^+ \overline{K}^0\) has a very small branching ratio at \(\cal O(10^{-8})\), due to the suppression from the CKM matrix elements |V ub * V cd |.


Matrix Element Type Diagram Annihilation Type 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

Copyright information

© Springer-Verlag Berlin Heidelberg / Società Italiana di Fisica 2003

Authors and Affiliations

  • C.-D. Lü
    • 1
  • K. Ukai
    • 2
  1. 1.CCAST (World Laboratory), P.O. Box 8730, Beijing 100080, P.R. China CN
  2. 2. Physics Department, Nagoya University, Nagoya 464-8602, Japan JP

Personalised recommendations