An alternative subtraction scheme for NLO calculations

TL;DR

This paper introduces a new subtraction scheme for NLO QCD calculations that reduces the number of momentum mappings needed, improving computational efficiency and integrating with parton shower methods.

Contribution

The paper proposes a novel subtraction scheme with fewer momentum mappings, derived from an improved parton shower framework, enhancing NLO QCD calculations.

Findings

Reduces the number of momentum mappings in subtraction terms

Derives momentum mapping and splitting functions from an improved parton shower

Demonstrates the scheme with the process e q -> e q (g)

Abstract

We present a new subtraction scheme for next-to-leading order QCD calculations, where the momentum mapping and the splitting functions have been derived in the context of an improved parton shower formulation. A main advantage of our scheme is the significantly reduced number of momentum mappings in the subtraction terms compared to standard schemes. We present the major features of our scheme and discuss the process e q -> e q (g) in more detail.