Energy flow in QCD and event shape functions

A. V. Belitsky, G. P. Korchemsky, G. Sterman

Research output: Contribution to journalArticlepeer-review

66 Scopus citations

Abstract

Hadronization corrections to the thrust and related event shape distributions in the two-jet kinematical region of e+e- annihilation are summarized by nonperturbative shape functions. The moments of shape functions are given by universal matrix elements in QCD, which describe the energy flow in QCD final states. We show how the nonperturbative structure of these matrix elements may be inferred from resummed perturbation theory and Lorentz invariance. This analysis suggests the same functional forms for the shape functions as were found in phenomenological studies, and sheds light on the physical significance of the parameters that characterize these functions.

Original languageEnglish (US)
Pages (from-to)297-307
Number of pages11
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume515
Issue number3-4
DOIs
StatePublished - Aug 30 2001

Keywords

  • Event shape distributions
  • Hadronization
  • QCD jets

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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