W-exchange and W-annihilation processes of B mesons

Abstract

Using the PQCD method we calculate the W-exchange and the W-annihilation processes of B mesons, which in general involve a charm quark or anti-quark in the final state. The nonvanishing amplitudes of these processes are found to be suppressed by a factor of $m_c/m_b$ compared to the tree or the time-like penguin processes, but some of them are within the reach of observation at the future B-factories, and ${\bar{B}}_d^0\to D_s^{+}{K}^{-}$ whose branching ratio is found to be $6.6\times 10^{-6}$ can be found even before the B-factory era. Comparisons with the results based on the BSW model are also given.

11 Pages including figures, accepted in Phys. Lett. B

Cited by in corpus (11)

• Experimental Tests of Factorization in Charmless Non-Leptonic Two-Body B Decays
• Combining CP Asymmetries in $B\to K\pi$ Decays
• Nonfactorizable Effects in Spectator and Penguin Amplitudes of Hadronic Charmless B Decays
• Observation of Ds+ K- and evidence for Ds+ pi- final states in neutral B decays
• Rescattering Information from $B\to K\bar{K}$ Decays
• Charmless B decays to eta' and eta
• Non-leptonic decays of the B_c into tensor mesons
• Experimental Results on Heavy Quarks
• Branching Fraction Measurements of the Color-Suppressed Decays B0bar to D(*)0 pi0, D(*)0 eta, D(*)0 omega, and D(*)0 eta_prime and Measurement of the Polarization in the Decay B0bar to D*0 omega
• Measurements of Branching Fractions for B0 --> Ds+pi- and B0-bar --> Ds+K-
• W-exchange/Annihilation amplitudes in LCSR - $B_d^0\to D_s^{-}{K}^{+}$ as an example