Factorization and Endpoint Singularities in Heavy-to-Light decays

Details Factorization and Endpoint Singularities in Heavy-to-Light decays Factorization and Endpoint Singularities in Heavy-to-Light decays

2002-11-06

arxiv.org/abs/hep-ph/0211069v2

Phys.Rev. D67 (2003) 071502

Physics

High Energy Physics

High Energy Physics - Phenomenology

5 pages, Added details on comparison with the literature

Scientific paper

10.1103/PhysRevD.67.071502

We prove a factorization theorem for heavy-to-light form factors. Our result differs in several important ways from previous proposals. A proper separation of scales gives hard kernels that are free of endpoint singularities. A general procedure is described for including soft effects usually associated with the tail of wavefunctions in hard exclusive processes. We give an operator formulation of these soft effects using the soft-collinear effective theory, and show that they appear at the same order in the power counting as the hard spectator contribution.

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