A new subtraction scheme for computing QCD jet cross sections at next-to-leading order accuracy

TL;DR

This paper introduces a novel subtraction scheme for calculating QCD jet cross sections at NLO, addressing challenges in extending to NNLO, and validates it through comparison with established methods.

Contribution

A new subtraction scheme is proposed that improves the calculation of jet cross sections at NLO and facilitates future NNLO extensions.

Findings

The new scheme accurately reproduces three-jet event-shape distributions.

Comparison with EVENT shows consistent results.

The scheme simplifies the extension to higher orders.

Abstract

We present a new subtraction scheme for computing jet cross sections in electron-positron annihilation at next-to-leading order accuracy in perturbative QCD. The new scheme is motivated by problems emerging in extending the subtraction scheme to the next-to-next-to-leading order. The new scheme is tested by comparing predictions for three-jet event-shape distributions to those obtained by the standard program EVENT.