München 2009 – scientific programme
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T: Fachverband Teilchenphysik
T 14: Flavorphysik (Theorie) 1
T 14.5: Talk
Tuesday, March 10, 2009, 17:45–18:00, M001
Factorization at Subleading Power for the B→ Xsγ Decay — •Michael Benzke — Johannes-Gutenberg-Universität Mainz
Soft-collinear effective theory is a useful tool to analyse the factorization properties of the B→ Xsγ decay rate in the endpoint region MB −2Eγ≪ MB. In order to better estimate the hadronic uncertainties in the calculation of the B→ Xsγ branching ratio, higher orders in the 1/mb expansion should be considered. As is the case for the leading power, these contributions also factorize into hard, jet and shapefunctions. In this talk the structure of this factorization formula at subleading power will be discussed.