B Meson Form Factors and Exclusive Decays

Details B Meson Form Factors and Exclusive Decays B Meson Form Factors and Exclusive Decays

1995-10-14

arxiv.org/abs/hep-ph/9510294v1

Nucl.Instrum.Meth. A368 (1995) 28-35

Physics

High Energy Physics

High Energy Physics - Phenomenology

14 pages, Latex, epsf.sty, 3 uuencoded .ps figures; invited talk presented by R. R\"uckl at the Workshop `Beauty 95', Oxford,

Scientific paper

10.1016/0168-9002(95)00999-X

We present results for the $B \rightarrow \pi$ and $D\rightarrow \pi$ 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 $B \ra \pi l^+ \nu$. 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 \rightarrow J/\psi K $.

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