Rare $B$-Decays and Heavy to Light Semileptonic Transitions in the Isgur and Wise Limit

Abstract

From the experimental branching ratios for $B^{-}-->{\rho }^0{l}^{-}{\bar{\nu }}_l$ and $D^+ --> {\overl K}^{*0}({\overl K}^0) e^+ ν_e$ one finds, in the Heavy Quark Limit of $HQET$, $|V_{bu}|=(8.1\pm 1.7)x10^{-3}$, larger but consistent with the actual quoted range $(2-7)x10^{-3}$. In the same framework one predicts for $R(B-->K^{\ast }\gamma )=(2\pm 2)10^{-2}$.

9 pages, 1 Figure avalaible on request from [email protected]

References in corpus (2)

• Radiative Rare B Decays into Higher K-Resonances
• The Rare Decay $B\to K^{\ast }\gamma$: A More Precise Calculation

Cited by in corpus (7)

• Exclusive Radiative B-Decays in the Light-Cone QCD Sum Rule Approach
• Lattice Study of the Decay B^0-bar -> rho^+ l^- nu_l-bar: Model-Independent Determination of |V_{ub}|
• Symmetry-breaking corrections to heavy meson form factor relations
• Form Factor $A_0(q^2)$, Non Leptonic $D(B)\to PV$ Transitions and Rare $B\to K^{\ast }\gamma$ Decays
• B -> K^* gamma from D -> K^* l nu
• First Lattice Study of the Form Factors A_0 and A_3 in the Decay Bbar^0 to rho^+ l^- nubar_l
• Constraints on B--->pi,K transition form factors from exclusive semileptonic D-meson decays