B -> K^* gamma from D -> K^* l nu

Abstract

The B -> K^* gamma branching fraction is predicted using heavy quark spin symmetry at large recoil to relate the tensor and (axial-)vector form factors, using heavy quark flavor symmetry to relate the B decay form factors to the measured D -> K^* l nu form form factors, and extrapolating the semileptonic B decay form factors to large recoil assuming nearest pole dominance. This prediction agrees with data surprisingly well, and we comment on its implications for the extraction of |Vub| from B -> rho l nu.

10 pages

References in corpus (7)

• Exclusive Semileptonic and Rare B-Meson Decays in QCD
• Lattice-Constrained Parametrizations of Form Factors for Semileptonic and Rare Radiative B Decays
• V_{ub} from the Hadronic Invariant Mass Spectrum in Semileptonic B Decay
• Comment on $V_{ub}$ from Exclusive Semileptonic B and D Decays
• Key Distributions for Charmless Semileptonic B Decay
• Measurement of the form-factor ratios for D^+ -> \overline K^{*0}e^+ν_e
• Heavy-to-Light Form Factors in the Final Hadron Large Energy Limit: Covariant Quark Model Approach

Cited by in corpus (8)

• Long-distance effects in $B\to V\gamma$ radiative weak decays
• Semileptonic Form-factors from B-> K* gamma Decays in the Large Energy Limit
• Measurement of B-->K*gamma Branching Fractions and Charge Asymmetries
• Evidence for Isospin Violation and Measurement of $CP$ Asymmetries in $B\to K^{\ast }(892)\gamma$
• Symmetry-breaking corrections to heavy meson form factor relations
• 1/m_Q Corrections to the Heavy-to-Light-Vector Transitions in the HQET
• Subleading corrections to the V_ub determination from exclusive B decays
• Constraints on B--->pi,K transition form factors from exclusive semileptonic D-meson decays