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

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

2007-11-26

arxiv.org/abs/0711.3999v2

JHEP 0802:031,2008

Physics

High Energy Physics

High Energy Physics - Phenomenology

27 pages, 19 figures, minor corrections, matches journal version

Scientific paper

10.1088/1126-6708/2008/02/031

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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