Universal Nonperturbative Effects in Event Shapes from Soft-Collinear Effective Theory

Details Universal Nonperturbative Effects in Event Shapes from Soft-Collinear Effective Theory Universal Nonperturbative Effects in Event Shapes from Soft-Collinear Effective Theory

2007-03-03

arxiv.org/abs/hep-ph/0703030v2

Mod.Phys.Lett.A22:835-851,2007

Physics

High Energy Physics

High Energy Physics - Phenomenology

Brief Review to appear in Mod. Phys. Lett. A, 16 pages. v2: References added, minor corrections

Scientific paper

10.1142/S021773230702289X

Two-jet event shape distributions, traditionally studied in the language of perturbative QCD, can be described naturally in soft-collinear effective theory. In this language, we demonstrate factorization of event shape distributions into perturbatively-calculable hard and jet functions and nonperturbative soft functions, and show how the latter contribute universal shifts to the mean values of various event shape distributions. Violations of universality in shifts of higher moments can give information on correlations of energy flow in soft radiation.

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