|V_{ub}| From Semileptonic Decay and b -> s gamma
High Energy Physics - Phenomenology
2007-05-23 v2
Abstract
Current errors on |V_{ub}| are dominated by model dependence. For inclusive decays, the model dependence comes from the Fermi motion of the b quark. By combining the endpoint photon and lepton spectra from the inclusive decays B -> X_s gamma and B -> X_u l nu, it is possible to remove this model dependence. We show how to combine these rates including the resummation of the endpoint logs at next to leading order. The theoretical errors on |V_{ub}| on the order of 10% are possible. We also give a brief discussion on comparing different extractions.
Cite
@article{arxiv.hep-ph/0011181,
title = {|V_{ub}| From Semileptonic Decay and b -> s gamma},
author = {Adam K. Leibovich},
journal= {arXiv preprint arXiv:hep-ph/0011181},
year = {2007}
}
Comments
8 pages. Talk given at Radcor 2000, Carmel, CA, Sept 2000