B meson light-cone distribution amplitudes in the heavy-quark limit

Details B meson light-cone distribution amplitudes in the heavy-quark limit B meson light-cone distribution amplitudes in the heavy-quark limit

2001-09-20

arxiv.org/abs/hep-ph/0109181v2

Phys.Lett.B523:111,2001; Erratum-ibid.B536:344,2002

Physics

High Energy Physics

High Energy Physics - Phenomenology

11 pages LaTeX; error in eqs. (6) and (11) corrected, and minor changes

Scientific paper

10.1016/S0370-2693(01)01299-0

We investigate the B meson light-cone distribution amplitudes in the heavy-quark limit which are relevant for the QCD factorization approach for the exclusive B meson decays. We derive exact relations between two- and three-particle distribution amplitudes from the QCD equations of motion and heavy-quark symmetry constraint. As solution of these relations, we give representations for the quark-antiquark distribution amplitudes in terms of independent dynamical degrees of freedom. In particular, we find that the Wandzura-Wilczek-type contributions are determined uniquely in analytic form in terms of \bar{\Lambda}, a fundamental mass parameter of heavy-quark effective theory, and that both leading- and higher-twist distribution amplitudes receive the contributions of multi-particle states with additional gluons.

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