Higher orders and infrared renormalon phenomenology in deeply virtual Compton scattering

A. V. Belitsky, A. Schäfer

Research output: Contribution to journalArticle

23 Scopus citations

Abstract

We present results for higher-order perturbative corrections to Compton scattering in the generalized Bjorken kinematics. The approach we have used is based on the combination of two techniques: conformal operator product expansion on the one side, and resummation of the fermion vacuum insertions with consequent restoration of the full QCD β-function via the naive non-abelianization assumption, on the other. These are terms which are lost in the former approach. Due to the presence of the infrared renormalon poles in the Borel transform of the resummed amplitude the latter suffers from ambiguities which reflect the asymptotic character of perturbation series. The residues of these IR renormalon poles give an estimate for the size of power corrections in deeply virtual Compton scattering.

Original languageEnglish (US)
Pages (from-to)235-263
Number of pages29
JournalNuclear Physics B
Volume527
Issue number1-2
DOIs
StatePublished - Aug 31 1998
Externally publishedYes

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Keywords

  • Conformal operator product expansion
  • Deeply virtual Compton scattering
  • Higher twists
  • Renormalons

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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