Effective Theory Description of Weak Annihilation in B-> Xu l nu Decays
High Energy Physics - Phenomenology
2008-11-26 v1 High Energy Physics - Experiment
High Energy Physics - Lattice
Abstract
The semileptonic B-> Xu l nu decays allow a pretty clean determination of the CKM matrix element |Vub|. Nevertheless, the presence of weak-annihilation effects near the end-point of the q2 spectrum introduces uncertainties in the inclusive calculation, requiring the use of non-perturbative techniques like heavy meson chiral perturbation theory and large NC limit.
Cite
@article{arxiv.hep-ph/0609002,
title = {Effective Theory Description of Weak Annihilation in B-> Xu l nu Decays},
author = {J. J. Sanz-Cillero},
journal= {arXiv preprint arXiv:hep-ph/0609002},
year = {2008}
}
Comments
3 pages, 2 figures. To appear in the proceedings of the 7th International Conference on Hyperons, Charm And Beauty Hadrons (BEACH 2006), 2nd-8th July 2006, Lancaster, England