B → πρ, πω decays in perturbative QCD approach
CCAST (World Laboratory), P.O. Box 8730, Beijing 100080, P.R. China
2 Institute of High Energy Physics, CAS, P.O. Box 918(4), Beijing 100039, P.R. China
3 Physics Department, Hiroshima University, Higashi-Hiroshima 739-8526, Japan
Published online: 8 February 2002
We calculate the branching ratios and CP-asymmetries for B0 → π+ ρ-, B0 → ρ+ π-, B+ → ρ+ π0, B+ → π+ ρ0, B0 → π0 ρ0, B+ → π0ω and B0 → π0ω decays, in the perturbative QCD approach. In this approach, we calculate non-factorizable and annihilation type contributions, in addition to the usual factorizable contributions. Our result is in agreement with the branching ratio of B0/ → π± ρ∓, B± → π± ρ0, π±ω measured by the CLEO and BABAR collaborations. We also predict large CP-asymmetries in these decays. These channels are useful to determine the CKM angle φ2.
© Società Italiana di Fisica, Springer-Verlag, 2002