SCET, Light-Cone Gauge and the T-Wilson Lines

Details SCET, Light-Cone Gauge and the T-Wilson Lines SCET, Light-Cone Gauge and the T-Wilson Lines

2011-04-04

arxiv.org/abs/1104.0686v1

Phys.Rev.D84:011502,2011

Physics

High Energy Physics

High Energy Physics - Phenomenology

4 pages

Scientific paper

10.1103/PhysRevD.84.011502

Soft-Collinear Effective Theory (SCET) has been formulated since a decade now in covariant gauges. In this work we derive a modified SCET Lagrangian applicable in both classes of gauges: regular and singular ones. This extends the range of applicability of SCET. The new Lagrangian must be used to obtain factorization theorems in cases where the transverse momenta of the particles in the final states are not integrated over, such as semi-inclusive deep inelastic scattering, Drell-Yan and the Higgs production cross-section at low transverse momentum. By doing so all non-perturbative matrix elements appearing in the factorized cross-sections are gauge invariant.

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