Exclusive semileptonic and rare<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>B</mml:mi></mml:math>meson decays in QCD

Abstract

We present the first complete results for the semileptonic and rare radiative form factors of the $B$ meson's weak decay into a light vector meson $(\ensuremath{\rho},\ensuremath{\omega}{,K}^{*},\ensuremath{\varphi})$ in the light-cone sum rule approach. The calculation includes radiative corrections, higher twist corrections, and SU(3) breaking effects. The theoretical uncertainty is investigated in detail. A simple parametrization of the form factors is given in terms of three parameters each. We find that the form factors observe several relations inspired by heavy quark symmetry.