Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2006-11-14
Phys.Rev.D75:054013,2007
Physics
High Energy Physics
High Energy Physics - Phenomenology
32 pages, 7 figures, the discussion of numerical results extended, two references added, version to be published in Phys.Rev.
Scientific paper
10.1103/PhysRevD.75.054013
New sum rules for $B\to \pi,K $ and $B\to \rho,K^*$ 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.
Khodjamirian Alexander
Mannel Thomas
Offen Nils
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