Soft Wilson lines in soft-collinear effective theory

Details Soft Wilson lines in soft-collinear effective theory Soft Wilson lines in soft-collinear effective theory

2004-12-08

arxiv.org/abs/hep-ph/0412110v1

Phys.Rev. D71 (2005) 056001

Physics

High Energy Physics

High Energy Physics - Phenomenology

36 pages, 10 figures, 3 tables

Scientific paper

10.1103/PhysRevD.71.056001

The effects of the soft gluon emission in hard scattering processes at the phase boundary are resummed in the soft-collinear effective theory (SCET). In SCET, the soft gluon emission is decoupled from the energetic collinear part, and is obtained by the vacuum expectation value of the soft Wilson-line operator. The form of the soft Wilson lines is universal in deep inelastic scattering, in the Drell-Yan process, in the jet production from e+e- collisions, and in the gamma* gamma* -> pi0 process, but its analytic structure is slightly different in each process. The anomalous dimensions of the soft Wilson-line operators for these processes are computed along the light-like path at leading order in SCET and to first order in alpha_s, and the renormalization group behavior of the soft Wilson lines is discussed.

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