SCET sum rules for heavy-to-light form factors

Junegone Chay, Chul Kim, Adam K. Leibovich

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

We consider a sum rule for heavy-to-light form factors in soft-collinear effective theory (SCET). Using the correlation function given by the time-ordered product of a heavy-to-light current and its hermitian conjugate, the heavy-to-light soft form factor ζP can be related to the leading-order B meson shape function. Using the scaling behavior of the heavy-to-light form factor in ΛQCD/mb, we put a constraint on the behavior of the B meson shape function near the endpoint. We employ the sum rule to estimate the size of ζP with the model for the shape function and find that it ranges from 0.01 to 0.07.

Original languageEnglish
Pages (from-to)57-65
Number of pages9
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume628
Issue number1-2
DOIs
Publication statusPublished - 2005 Nov 3

Keywords

  • Heavy-to-light form factor
  • Soft-collinear effective theory
  • Sum rule

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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