The B --> pi form factor from light-cone sum rules in soft-collinear effective theory

Details The B --> pi form factor from light-cone sum rules in soft-collinear effective theory The B --> pi form factor from light-cone sum rules in soft-collinear effective theory

2005-09-16

arxiv.org/abs/hep-ph/0509167v1

PoS HEP2005:215,2006

Physics

High Energy Physics

High Energy Physics - Phenomenology

5 pages, one figure

Scientific paper

Recently, we have derived light-cone sum rules for exclusive B-meson decays into light energetic hadrons from correlation functions within soft-collinear effective theory. In these sum rules the short-distance scale refers to ``hard-collinear'' interactions with virtualities of order \Lambda_{QCD} m_b. Hard scales (related to virtualities of order m_b^2) are integrated out and enter via external coefficient functions in the sum rule. Soft dynamics is encoded in light-cone distribution amplitudes for the B-meson, which describe both the factorizable and non-factorizable contributions to exclusive B-meson decay amplitudes. Factorization of the correlation function has been verified to one-loop accuracy. Thus, a systematic separation of hard, hard-collinear, and soft dynamics in the heavy-quark limit is possible.

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