Determination of the weak phase gamma=arg(V_ub^*)

Details Determination of the weak phase gamma=arg(V_ub^*) Determination of the weak phase gamma=arg(V_ub^*)

1999-10-28

arxiv.org/abs/hep-ph/9910530v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

12 pages, 5 figures; invited talk presented at the 8th International Symposium on Heavy Flavour Physics (Heavy Flavours 8)

Scientific paper

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.

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