Radiative B decays to the axial $K$ mesons at next-to-leading order

Abstract

We calculate the branching ratios of $B\to K_1\gamma$ at next-to-leading order (NLO) of ${\alpha }_s$ where $K_1$ is the orbitally excited axial vector meson. The NLO decay amplitude is divided into the vertex correction and the hard spectator interaction part. The one is proportional to the weak form factor of $B\to K_1$ transition while the other is a convolution between light-cone distribution amplitudes and hard scattering kernel. Using the light-cone sum rule results for the form factor, we have $\calB(B^0\to K_1^0(1270)γ)=(0.828\pm0.335)\times 10^{-5}$ and $\calB(B^0\to K_1^0(1400)γ)=(0.393\pm0.151)\times 10^{-5}$.

17pages, 4 figures. Minor changes, typos corrected. PRD accepted version

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• Rare radiative exclusive B decays in soft-collinear effective theory
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Cited by in corpus (12)

• Light-Cone Distribution Amplitudes of Axial-vector Mesons
• $B\to K_1\gamma$ Decays in the Light-Cone QCD Sum Rules
• Form factors, branching ratio and forward-backward asymmetry in B -> K_{1}ell ^{+} ell ^{-} decays
• B -> K1 gamma and tests of factorization for two-body non leptonic Bdecays with axial-vector mesons
• Radiative $B\to K_1$ decays in the light-cone sum rules
• Implications of the first observation of $B\to K_1\gamma$
• Penguin-induced Radiative Baryonic B Decays Revisited
• Branching ratio for B -> K_1 gamma decay in next-to-leading order in LEET
• Annihilation Contributions in B -> K_1 gamma decay in next-to-leading order in LEET and CP-asymmetry
• Radiative $B$ to axial-vector meson decays at NLO in Soft-Collinear Effective Theory
• Branching Ratio and CP-asymmetry for B-> 1^{1}P_{1}gamma decays
• Mass relations among family members of quarks and leptons