Bonn 2010 – scientific programme
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T: Fachverband Teilchenphysik
T 15: Flavourphysik (Theorie) I
T 15.7: Talk
Wednesday, March 17, 2010, 15:30–15:45, HG XIII
Uncertainties in the B→ Xsγ Decay due to Subleading Power Corrections — •Michael Benzke1, Seung J. Lee2, Matthias Neubert1, and Gil Paz3 — 1Johannes Gutenberg-Universität, Mainz — 2Weizmann Institute of Science, Rehovot, Israel — 3University of Chicago, Chicago, U.S.A.
The rare decay B→ Xsγ is of interest, since it can be used to probe the standard model and constrain possible new physics scenarios. For this it is necessary to theoretically predict the decay rate as precisely as possible and to reliably estimate the uncertainties. Today, the major source of uncertainty is of a non-perturbative nature and originates from the low energy strong interactions within the hadron. It can be systematically dealt with within the framework of SCET. In this talk I will present our estimate on the non-perturbative uncertainties based on an SCET analysis at subleading power.