Comment on $V_{ub}$ from Exclusive Semileptonic B and D Decays

Abstract

The prospects for determining $|V_{ub}|$ from exclusive B semileptonic decay are discussed. The double ratio of form factors $(f^{B\to \rho }/f^{B\to K^{\ast }})/(f^{D\to \rho }/f^{D\to K^{\ast }})$ is calculated using chiral perturbation theory. Its deviation from unity due to contributions that are non-analytic in the symmetry breaking parameters is very small. Combining experimental data obtainable from (B->rho l nu), (B->K* l l) and (D->rho l nu) can lead to a model independent determination of $|V_{ub}|$ with an uncertainty from theory of about 10%.

14 pages, 3 figs, minor typos corrected, to appear in Phys. Lett. B

References in corpus (1)

• V_{ub} from the Hadronic Invariant Mass Spectrum in Semileptonic B Decay

Cited by in corpus (35)

• A Comparative Study of the Decays $B\to (K,K^{\ast }){\ell }^{+}{\ell }^{-}$ in Standard Model and Supersymmetric Theories
• Analysis of Neutral Higgs-Boson Contributions to the Decays B_s -> l^+l^- and B -> K l^+l^-
• Chiral perturbation theory for heavy hadrons and chiral effective field theory for heavy hadronic molecules
• Exclusive rare B -> K*e+e- decays at low recoil: controlling the long-distance effects
• Phenomenology of non-standard Z couplings in exclusive semileptonic b -> s transitions
• SU(3) Breaking and D0-D0bar Mixing
• The $D^0-{\bar{D}}^0$ mass difference from a dispersion relation
• Extraction of the D^*Dπcoupling from D^* decays
• Rare Decays of Λ_b->Λ+ γand Λ_b ->Λ+ l^{+} l^{-} in the Light-cone Sum Rules
• Nonperturbative Effects in $\bar{B}\to X_s{l}^{+}{l}^{-}$ for Large Dilepton Invariant Mass
• A Model Independent Determination of |V_{ub}|
• Looking for Novel CP-Violating Effects in B->K^*l^+l^-
• Precise predictions for B -> Xs l+ l- in the large q^2 region
• Symmetry-breaking corrections to heavy meson form factor relations
• The B -> X_d l^+ l^- decay in general two Higgs doublet model
• Flavour-Conserving CP Phases in Supersymmetry and Implications for Exclusive B Decays
• Measurement of the form-factor ratios for D+ --> K* l nu
• B--> K^* l^+ l^- decay in the two Higgs doublet model with flavor changing neutral currents
• Double-lepton polarization asymmetries in the Exclusive (B -> rho l^+ l^-) decay beyond the Standard Model
• Exclusive (B -> rho l^+ l^-) decay and Polarized lepton pair forward--backward asymmetries
• B -> K^* gamma from D -> K^* l nu
• CP Violation in rare semileptonic B decays and supersymmetry
• General analysis of CP violation in polarized (b -> d l^+ l^-) decay
• Phenomenological Profiles of the Inclusive Hadron Spectra in the Decay $B\to X_s{\ell }^{+}{\ell }^{-}$
• Measurement of the form-factor ratios for D_s^+ -> phi ell^+ nu_ell
• 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
• Photonic and Leptonic Rare B Decays
• Contribution of vector resonances to the {\bar B}_d^0 -> {\bar K}^{*0} mu^+ mu^- decay
• New Measurement of BR(D+ ->Rho0 Mu+ Nu) / BR(D+ ->K*0 Mu+ Nu) Branching Ratio
• Analysis of Forward-Backward and Lepton Polarization Asymmetries in $B\to K_1{\ell }^{+}{\ell }^{-}$ Decays in the Two-Higgs-doublet Model
• Constraints on B--->pi,K transition form factors from exclusive semileptonic D-meson decays
• Asymmetries in $B\to K^{\ast }{\ell }^{+}{\ell }^{-}$ Decays and Two Higgs Doublet Model
• Baryons and baryoniums in the perspective of QCD sum rules
• Standard Model CP violation in B->X_d \ell^+\ell^- decays