B Meson Form Factors and Exclusive Decays

Abstract

We present results for the $B\to \pi$ and $D\to \pi$ form factors derived from QCD sum rules on the light-cone. Our predictions are compared with experiment and used to extract the quark mixing parameter $|V_{ub}|$ from a recent CLEO measurement of $B \ra πl^+ ν$. Furthermore, we discuss the factorization approximation for exclusive nonleptonic matrix elements, and describe a first QCD estimate of the nonfactorizable contribution to the amplitude of $B\to J/\psi K$.

14 pages, Latex, epsf.sty, 3 uuencoded .ps figures; invited talk presented by R. Rückl at the Workshop `Beauty 95', Oxford, July 9-14,1995, to appear in the proceedings

References in corpus (7)

• $D^{\ast }D\pi$ and $B^{\ast }B\pi$ couplings in QCD
• QCD Calculation of the $B\to \pi ,K$ Form Factors
• The Semileptonic Decays $D\to \pi (\rho )e\nu$ and $B\to \pi (\rho )e\nu$ from QCD Sum Rules
• Exclusive Hadronic B Decays to Charm and Charmonium Final States
• QCD Factors a1 and a2 Beyond Leading Logarithms Versus Factorization in Non-Leptonic Heavy Meson Decays
• ``Non-factorizable'' terms in hadronic B-meson weak decays
• Soft Gluon Suppression of $1/N_c$ Contributions in Color Suppressed Heavy Meson Decays

Cited by in corpus (9)

• $B\to J/\psi K$ Decays in QCD Factorization
• Updated Analysis of a_1 and a_2 in Hadronic Two-body Decays of B Mesons
• Weak Decay Form Factors of Heavy Pseudoscalar Mesons within a Light-Front Constituent Quark Model
• Can $B\to J/\psi K(K^{\ast })$ decays be described by factorization ?
• Exclusive semileptonic decays of heavy mesons in quark model
• Distribution of valence quarks and light-cone QCD sum rules
• Non-Leptonic Decays of B Mesons and Strong Coupling Constants
• Possible Explanation Why τ_{B^{\pm}}\simτ_{B^0} But τ_{D^{\pm}}\sim τ_{D^0}
• A New Model-independent Method of Determining |V_{ub}/V_{cb}|