$ B \to (ρ, ω)γ$ Decays and CKM Phenomenology

Details $ B \to (ρ, ω)γ$ Decays and CKM Phenomenology $ B \to (ρ, ω)γ$ Decays and CKM Phenomenology

2006-10-12

arxiv.org/abs/hep-ph/0610149v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

15 pages, 3 figures; presented by Alexander Parkhomenko at the 14th International Seminar on High Energy Physics: Quarks-2006,

Scientific paper

We review and update the branching ratios for the $B \to (\rho,\omega) \gamma$ decays, calculated in the QCD factorization approach in the next-to-leading order (NLO) in the strong coupling $\alpha_s$ and to leading power in $\Lambda_{\rm QCD}/m_b$. The corrections take into account the vertex, hard-spectator and annihilation contributions and are found to be large. Theoretical expectations for the branching ratios, CP-asymmetry, isospin- and $SU (3)_{\rm F}$-violating ratios in the $B \to \rho\gamma$ and $B \to \omega\gamma$ decays are presented and compared with the available data.

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