SCET sum rules for B->P and B->V transition form factors
Abstract
We investigate sum rules for heavy-to-light transition form factors at large recoil derived from correlation functions with interpolating currents for light pseudoscalar or vector fields in soft-collinear effective theory (SCET). We consider both, factorizable and non-factorizable contributions at leading power in the Lambda/m_b expansion and to first order in the strong coupling constant alpha_s, neglecting contributions from 3-particle distribution amplitudes in the B-meson. We pay particular attention to various sources of parametric and systematic uncertainties. We also discuss certain form factor ratios where part of the hadronic uncertainties related to the B-meson distribution amplitude and to logarithmically enhanced alpha_s corrections cancel.
Cite
@article{arxiv.0711.3999,
title = {SCET sum rules for B->P and B->V transition form factors},
author = {F. De Fazio and Th. Feldmann and T. Hurth},
journal= {arXiv preprint arXiv:0711.3999},
year = {2009}
}
Comments
27 pages, 19 figures, minor corrections, matches journal version