Tree-penguin interference and tests forcosγ<0in rareB→PP,

Abstract

Tree-Penguin Interference andTests for cos γ < 0 in Rare B → P P , P V and V V Decays AbstractRecent rare B → P P , P V decay data suggest that factorization holds well if, contrary to current fits, one has cos γ < 0 where γ ≡ arg(V * ub ). We update previous results with light cone sum rule form factors, which seem to work better. We then discuss various B → V V modes as well as the K * η modes. Finding the pattern of ρand K * + η > K * 0 η would strengthen the support for cos γ < 0. The electroweak penguin enhances (suppresses) the K * + ρ 0 (K * 0 ρ 0 ) rate by a factor of 2, and finding K * + ρ 0 ≃ K * + ρ − would be strong evidence for the electroweak penguin.

Measurements of B Meson Decays to omega K* and omega rho

“…Theoretical estimates of the branching fractions for vector-vector decays include those based on isospin relations among various modes [11], effective Hamiltonians with factorization and specific B-to-light-meson form factors [10,[12][13][14], and QCD factorization [15]. The estimated branching fractions lie in the range < 10…”