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arXiv · 0711.3999

SCET sum rules for B->P and B->V transition form factors

F. De Fazio·Th. Feldmann·T. Hurth
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Abstract

We investigate sum rules for heavy-to-light transition form factors at large recoil derived from correlation functions with interpolating currents for light pseudoscalar or vector fields in soft-collinear effective theory (SCET). We consider both, factorizable and non-factorizable contributions at leading power in the Lambda/m_b expansion and to first order in the strong coupling constant alpha_s, neglecting contributions from 3-particle distribution amplitudes in the B-meson. We pay particular attention to various sources of parametric and systematic uncertainties. We also discuss certain form factor ratios where part of the hadronic uncertainties related to the B-meson distribution amplitude and to logarithmically enhanced alpha_s corrections cancel.

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F. De Fazio, Th. Feldmann, T. Hurth. 2008-02-21. SCET sum rules for B->P and B->V transition form factors. https://doi.org/10.1088/1126-6708%2F2008%2F02%2F031

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