The B -> pi Form Factor from Light-cone Sum Rules in Soft-collinear Effective Theory

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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 [1]. In these sum rules the short-distance scale refers to ''hard-collinear'' interactions with virtualities of order {Lambda}{sub QCD}m{sub b}. Hard scales (related to virtualities of order m{sub b}{sup 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, ... continued below

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5 pages

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Hurth, Tobias; /SLAC, /CERN; De Fazio, Fulvia; /INFN, Bari; Feldmann, Thorsten & U., /Siegen October 17, 2005.

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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 [1]. In these sum rules the short-distance scale refers to ''hard-collinear'' interactions with virtualities of order {Lambda}{sub QCD}m{sub b}. Hard scales (related to virtualities of order m{sub b}{sup 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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5 pages

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  • Report No.: SLAC-PUB-11484
  • Grant Number: AC02-76SF00515
  • DOI: 10.2172/878084 | External Link
  • Office of Scientific & Technical Information Report Number: 878084
  • Archival Resource Key: ark:/67531/metadc876531

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  • October 17, 2005

Added to The UNT Digital Library

  • Sept. 21, 2016, 2:29 a.m.

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  • Dec. 2, 2016, 8:28 p.m.

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Hurth, Tobias; /SLAC, /CERN; De Fazio, Fulvia; /INFN, Bari; Feldmann, Thorsten & U., /Siegen. The B -> pi Form Factor from Light-cone Sum Rules in Soft-collinear Effective Theory, report, October 17, 2005; [Menlo Park, California]. (digital.library.unt.edu/ark:/67531/metadc876531/: accessed November 19, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.