Determination of the weak phase gamma=arg(V_ub^*)
Abstract
Various strategies for extracting or constraining the weak phase gamma with controlled theoretical uncertainties are reviewed. Measurements of the rates for the hadronic decays B^+- -> pi K provide largely model-independent information on gamma. Hadronic uncertainties enter only at the level of nonfactorizable contributions to the decay amplitudes that are power-suppressed in Lambda/m_b and, simultaneously, violate SU(3) flavor symmetry or are doubly Cabibbo suppressed. In addition, these decays have a rich potential for probing physics beyond the Standard Model. Alternative proposals for learning gamma are also discussed briefly.
Cite
@article{arxiv.hep-ph/9910530,
title = {Determination of the weak phase gamma=arg(V_ub^*)},
author = {Matthias Neubert},
journal= {arXiv preprint arXiv:hep-ph/9910530},
year = {2007}
}
Comments
12 pages, 5 figures; invited talk presented at the 8th International Symposium on Heavy Flavour Physics (Heavy Flavours 8)