Gauge choice for organizing infrared singularities in QCD

Abstract

We explore the features of interpolating gauge for QCD. This gauge, defined by Doust and by Baulieu and Zwanziger, interpolates between Feynman gauge or Lorenz gauge and Coulomb gauge. We argue that it could be useful for defining the splitting functions for a parton shower beyond order $\text{as}$ or for defining the infrared subtraction terms for higher order perturbative calculations.

Comments: 39 pages, 18 figures; published version; title changed