TY - JOUR
T1 - Factorization and end point singularities in heavy-to-light decays
AU - Bauer, Christian W.
AU - Pirjol, Dan
AU - Stewart, Iain W.
PY - 2003
Y1 - 2003
N2 - 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 end point singularities. A general procedure is described for including soft effects usually associated with the tail of wave functions 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.
AB - 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 end point singularities. A general procedure is described for including soft effects usually associated with the tail of wave functions 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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U2 - 10.1103/PhysRevD.67.071502
DO - 10.1103/PhysRevD.67.071502
M3 - Article
AN - SCOPUS:0038101423
SN - 1550-7998
VL - 67
JO - Physical Review D - Particles, Fields, Gravitation and Cosmology
JF - Physical Review D - Particles, Fields, Gravitation and Cosmology
IS - 7
ER -