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arXiv · hep-ph/0611193

Form Factors from Light-Cone Sum Rules with B-Meson Distribution Amplitudes

Alexander Khodjamirian·Thomas Mannel·Nils Offen
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Abstract

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.

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Alexander Khodjamirian, Thomas Mannel, Nils Offen. 2007-02-02. Form Factors from Light-Cone Sum Rules with B-Meson Distribution Amplitudes. https://doi.org/10.1103/physrevd.75.054013

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