Eur. Phys. J. C 23, 275-287 (2002)
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

Abstract

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.