\(B\to \pi \rho, \pi \omega\) decays in perturbative QCD approach
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We calculate the branching ratios and CP-asymmetries for \(B^0 \to \pi^+\rho^-, B^0 \to \rho^+\pi^-, B^+ \to \rho^+\pi^0\), \(B^+ \to \pi^+\rho^0, B^0 \to \pi^0\rho^0, B^+ \to \pi^+\omega\) and \(B^0 \to \pi^0\omega\) 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 \(B^0/\bar B^0 \to \pi^\pm\rho^\mp, B^\pm \to \pi^\pm\rho^0\), \(\pi^\pm \omega\) 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 \(\phi_2\).
KeywordsType Contribution BABAR Collaboration Factorizable Contribution Annihilation Type
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