B Decays in the Upsilon Expansion

Details B Decays in the Upsilon Expansion B Decays in the Upsilon Expansion

1999-11-12

arxiv.org/abs/hep-ph/9911336v2

Physics

High Energy Physics

High Energy Physics - Phenomenology

4 pages, Talk given at the International Europhysics Conference on High Energy Physics (EPS-HEP'99), 15-21 July 1999, Tampere,

Scientific paper

Theoretical predictions for B decay rates are rewritten in terms of the Upsilon meson mass instead of the b quark mass, using a modified perturbation expansion. The theoretical consistency is shown both at low and high orders. This method improves the behavior of the perturbation series for inclusive and exclusive decay rates, and the largest theoretical error in the predictions coming from the uncertainty in the quark mass is eliminated. Applications to the determination of CKM matrix elements, moments of inclusive decay distributions, and the B -> X_s \gamma photon spectrum are discussed.

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