2006/11/30 by Alexander Khodjamirian, Thomas Mannel, Nils Offen · 1 citation
Physics and Astronomy · #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ph
paper · pdf · doi:10.1103/physrevd.75.054013
published as Phys.Rev.D75:054013,2007 · 32 pages, 7 figures, the discussion of numerical results extended, two references added, version to be published in Phys.Rev. D
arxiv created 2007/02/02 · openalex publication_date 2007/03/14 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
New sum rules for B\ensuremath→\ensuremathπ,K and B\ensuremath→\ensuremathρ,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 heavy-quark effective theory. Employing the new light-cone sum rules, we calculate the form factors at small momentum transfers, including SU(3)-violation effects. The results agree with the predictions of the conventional light-cone sum rules.