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

Hurth, Tobias; Feldmann, Thorsten; De Fazio, Fulvia

doi:10.22323/1.021.0215

Article
Report number	hep-ph/0509167 ; SLAC-PUB-11484 ; CERN-PH-TH-2005-167 ; BARI-TH-05-518 ; SI-HEP-2005-12 ; BARI-TH-518 ; CERN-PH-TH-2005-167 ; SI-HEP-2005-12 ; SLAC-PUB-11484
Title	The $B \to \pi$ form factor from light-cone sum rules in soft-collinear effective theory
Related title	LIGHT CONE SOFT COLLINEAR
Author(s)	Hurth, Tobias (CERN ; SLAC) ; De Fazio, Fulvia (INFN, Bari) ; Feldmann, Thorsten (Siegen U.)
Publication	2006
Imprint	16 Sep 2005
Number of pages	5
In:	PoS HEP2005 (2006) 215
In:	International Europhysics Conference on High-Energy Physics, Lisbon, Portugal, 21 - 27 Jul 2005, pp.215
DOI	10.22323/1.021.0215
Subject category	Particle Physics - Phenomenology
Abstract	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.
Copyright/License	CC-BY-NC-SA-3.0