Scaling of Power Corrections for Angularities from Dressed Gluon Exponentiation

Details Scaling of Power Corrections for Angularities from Dressed Gluon Exponentiation Scaling of Power Corrections for Angularities from Dressed Gluon Exponentiation

2004-07-02

arxiv.org/abs/hep-ph/0407024v1

Phys.Rev. D70 (2004) 094010

Physics

High Energy Physics

High Energy Physics - Phenomenology

24 pages

Scientific paper

10.1103/PhysRevD.70.094010

We study power corrections to a recently introduced family of event shapes, the class of angularities, within the formalism of dressed gluon exponentiation (DGE). We find that the universal scaling rule for the leading power corrections deduced from resummation also holds when taking renormalon enhancements into account. The scaling is due to boost invariance of eikonal dynamics in the two-jet limit, which we recover in the context of DGE. Furthermore, dressed gluon exponentiation provides an ansatz for non-leading power corrections that violate the scaling. These non-leading corrections are further suppressed by non-integer powers of the hard scale.

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