Cancellation of power enhancements in non-spectator decays

Details Cancellation of power enhancements in non-spectator decays Cancellation of power enhancements in non-spectator decays

1993-12-06

arxiv.org/abs/hep-ph/9312234v1

Phys.Lett. B325 (1994) 473-480

Physics

High Energy Physics

High Energy Physics - Phenomenology

13 pages, LaTex version 2.09

Scientific paper

10.1016/0370-2693(94)90042-6

Exclusive non-spectator decay rates of beauty hadrons contain power enhancements of the form (m_b/m)^2 and m_b/m, where m_b is the b-quark mass and m is a light quark mass. An implicit argument has been recently given according to which these singularities cancel in the totally inclusive decay width. We present in this note a completely explicit computation of the diagrams containing power enhancements. Our results agree with the previous general conclusion.

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