Constraint equations for heavy-to-light currents in SCET
High Energy Physics - Phenomenology
2013-05-29 v1
Abstract
A complete basis for the next-to-next-to leading order heavy-to-light currents in the soft-collinear effective theory is constructed. Reparameterization invariance is imposed by deriving constraint equations. Their solutions give the set of allowed Dirac structures as well as relations between the Wilson coefficients of operators that appear at different orders in the power expansion. The completeness of reparameterization invariance constraints derived on a projected surface is investigated. We also discuss the universality of the ultrasoft Wilson line with boundary conditions.
Keywords
Cite
@article{arxiv.hep-ph/0508214,
title = {Constraint equations for heavy-to-light currents in SCET},
author = {Christian M. Arnesen and Joydip Kundu and Iain W. Stewart},
journal= {arXiv preprint arXiv:hep-ph/0508214},
year = {2013}
}
Comments
35 pages