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Universality of Nonperturbative Effects in Event Shapes

Christopher Lee·George Sterman
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Abstract

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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Christopher Lee, George Sterman. 2006-03-09. Universality of Nonperturbative Effects in Event Shapes. https://arxiv.org/abs/hep-ph/0603066

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