TY - JOUR
T1 - SCET sum rules for heavy-to-light form factors
AU - Chay, Junegone
AU - Kim, Chul
AU - Leibovich, Adam K.
PY - 2005/11/3
Y1 - 2005/11/3
N2 - We consider a sum rule for heavy-to-light form factors in soft-collinear effective theory (SCET). Using the correlation function given by the time-ordered product of a heavy-to-light current and its hermitian conjugate, the heavy-to-light soft form factor ζP can be related to the leading-order B meson shape function. Using the scaling behavior of the heavy-to-light form factor in ΛQCD/mb, we put a constraint on the behavior of the B meson shape function near the endpoint. We employ the sum rule to estimate the size of ζP with the model for the shape function and find that it ranges from 0.01 to 0.07.
AB - We consider a sum rule for heavy-to-light form factors in soft-collinear effective theory (SCET). Using the correlation function given by the time-ordered product of a heavy-to-light current and its hermitian conjugate, the heavy-to-light soft form factor ζP can be related to the leading-order B meson shape function. Using the scaling behavior of the heavy-to-light form factor in ΛQCD/mb, we put a constraint on the behavior of the B meson shape function near the endpoint. We employ the sum rule to estimate the size of ζP with the model for the shape function and find that it ranges from 0.01 to 0.07.
KW - Heavy-to-light form factor
KW - Soft-collinear effective theory
KW - Sum rule
UR - http://www.scopus.com/inward/record.url?scp=26244444688&partnerID=8YFLogxK
U2 - 10.1016/j.physletb.2005.09.025
DO - 10.1016/j.physletb.2005.09.025
M3 - Article
AN - SCOPUS:26244444688
SN - 0370-2693
VL - 628
SP - 57
EP - 65
JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
IS - 1-2
ER -