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

Hiroyuki Kawamura·Jiro Kodaira·Cong-Feng Qiao·Kazuhiro Tanaka
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Abstract

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 \barΛ, 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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Hiroyuki Kawamura, Jiro Kodaira, Cong-Feng Qiao, Kazuhiro Tanaka. 2002-04-11. B meson light-cone distribution amplitudes in the heavy-quark limit. https://doi.org/10.1016/s0370-2693(01)01299-0

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