Universality of Nonperturbative Effects in Event Shapes

Details Universality of Nonperturbative Effects in Event Shapes Universality of Nonperturbative Effects in Event Shapes

2006-03-09

arxiv.org/abs/hep-ph/0603066v1

ECONFC0601121:A001,2006

Physics

High Energy Physics

High Energy Physics - Phenomenology

4 pages; to appear in the Proceedings of the FRIF Workshop on First Principles Non-Perturbative QCD of Hadron Jets (Paris, 12-

Scientific paper

Nonperturbative effects in event shape distributions can be characterized by shape functions derived in the eikonal approximation or, equivalently, from soft-collinear effective theory. The use of energy flow operators and the boost invariance of the Wilson lines of soft gluons in the shape functions leads to a proof of universality for power corrections to the mean values of event shapes, without invoking the single gluon approximation.

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