Nagy-Soper subtraction scheme for multiparton final states

TL;DR

This paper extends a subtraction scheme for NLO QCD calculations to any number of massless final-state partons, simplifying computations and demonstrating its application to three-jet production at lepton colliders.

Contribution

It introduces a generalized subtraction scheme based on improved parton shower kernels with fewer momentum mappings for arbitrary final-state partons.

Findings

Successfully applied to three-jet production at lepton colliders

Provides real emission and integrated subtraction terms for any number of massless partons

Achieves consistent NLO calculations with reduced complexity

Abstract

In this work, we present the extension of an alternative subtraction scheme for next-to-leading order QCD calculations to the case of an arbitrary number of massless final-state partons. The scheme is based on the splitting kernels of an improved parton shower and comes with a reduced number of final state momentum mappings. While a previous publication including the setup of the scheme has been restricted to cases with maximally two massless partons in the final state, we here provide the final state real emission and integrated subtraction terms for processes with any number of massless partons. We apply our scheme to three jet production at lepton colliders at next-to-leading order and present results for the differential C parameter distribution.