Form Factors from Light-Cone Sum Rules with B-Meson Distribution Amplitudes
Loading...
Date
Journal Title
Journal ISSN
Volume Title
Publisher
Abstract
Description
New sum rules for $B\to π,K $ and $B\to ρ,K^*$ form factors are derived from the correlation functions expanded near the light-cone in terms of B-meson distribution amplitudes. The contributions of quark-antiquark and quark-antiquark-gluon components in the B meson are taken into account. Models for the B-meson three-particle distribution amplitudes are suggested, based on QCD sum rules in HQET. Employing the new light-cone sum rules we calculate the form factors at small momentum transfers, including $SU(3)_{fl}$ violation effects. The results agree with the predictions of the conventional light-cone sum rules.
32 pages, 7 figures, the discussion of numerical results extended, two references added, version to be published in Phys.Rev. D
32 pages, 7 figures, the discussion of numerical results extended, two references added, version to be published in Phys.Rev. D