B->pi,K,eta Decay Formfactors from Light-Cone Sum Rules
High Energy Physics - Phenomenology
2017-08-23 v1
Abstract
We present an improved calculation of all B -> light pseudoscalar formfactors from light-cone sum rules, including one-loop radiative corrections to twist-2 and twist-3 contributions, and leading order twist-4 corrections. The total theoretical uncertainty of our results at zero momentum transfer is 10 to 13%. The dependence of the formfactors on the momentum transfer q^2 is parametrized in a simple way that is consistent with their analytical properties and is valid for all physical q^2. The uncertainty of the extrapolation in q^2 on the semileptonic decay rate Gamma(B -> pi e nu) is estimated to be 5%.
Cite
@article{arxiv.hep-ph/0406261,
title = {B->pi,K,eta Decay Formfactors from Light-Cone Sum Rules},
author = {Patricia Ball and Roman Zwicky},
journal= {arXiv preprint arXiv:hep-ph/0406261},
year = {2017}
}
Comments
10 pages; talk given at Continuous Advances in QCD 2004, Minneapolis, May 2004