Implications of the first observation of $B\to K_1\gamma$

Abstract

Implications of the recent new measurements of $B\to K_1\gamma$ by Belle are examined. It is shown that the new branching ratio $\calB(B\to K_1(1270)γ)$ requires very large form factor compared to the theoretically predicted one. This is an opposite case to $B\to K^{\ast }\gamma$ where theory expected larger branching ratio. Possible origins of the discrepancy are discussed.

4 pages, 3 figures

References in corpus (1)

• Measurement of the B0 -> K2*(1430)0 gamma and B+ -> K2*(1430)+ gamma branching fractions

Cited by in corpus (14)

• Light-Cone Distribution Amplitudes of Axial-vector Mesons
• $B\to K_1\gamma$ Decays in the Light-Cone QCD Sum Rules
• Light-Cone Distribution Amplitudes for the Light $1^1{P}_1$ Mesons
• 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
• 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
• How many quarks and leptons ?
• Radiative $B$ to axial-vector meson decays at NLO in Soft-Collinear Effective Theory
• Why does group theory fail to describe charge structure of particles ?
• $B\to K_1(1270)(\to \rho K){\ell }^{+}{\ell }^{-}$ in LEET
• Branching Ratio and CP-asymmetry for B-> 1^{1}P_{1}gamma decays
• Mass relations among family members of quarks and leptons