https://doi.org/10.1140/epjc/s10052-012-1914-4
Regular Article - Theoretical Physics
Charmless B s →PP, PV, VV decays based on the six-quark effective Hamiltonian with strong phase effects II
1
State Key Laboratory of Theoretical Physics, Kavli Institute for Theoretical Physics China, Institute of Theoretical Physics, Chinese Academy of Sciences, Beijing, 100190, China
2
Institute of Particle Physics, Huazhong Normal University, Wuhan, Hubei, 430079, China
3
Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, 100048, China
* e-mail: zhuangc@itp.ac.cn
Received:
17
July
2011
Revised:
4
January
2012
Published online:
8
March
2012
We provide a systematic study of charmless B s →PP, PV, VV decays (P and V denote pseudoscalar and vector mesons, respectively) based on an approximate six-quark operator effective Hamiltonian from QCD. The calculation of the relevant hard-scattering kernels is carried out, the resulting transition form factors are consistent with the results of QCD sum-rule calculations. By taking into account important classes of power corrections involving “chirally enhanced” terms and the vertex corrections as well as weak annihilation contributions with non-trivial strong phase, we present predictions for the branching ratios and CP asymmetries of B s decays into PP, PV and VV final states, and also for the corresponding polarization observables in VV final states. It is found that the weak annihilation contributions with non-trivial strong phase have remarkable effects on the observables in the color-suppressed and penguin-dominated decay modes. In addition, we discuss the SU(3) flavor symmetry and show that the symmetry relations are generally respected.
© Springer-Verlag / Società Italiana di Fisica, 2012
