https://doi.org/10.1007/s100520100878
B → πρ, πω decays in perturbative QCD approach
1
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
Received:
5
November
2001
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