Hard Corrections in Precision QCD for LHC and FCC Physics: A New Approach

TL;DR

This paper introduces a novel method to eliminate unphysical divergences in fixed-order QCD corrections at high energies, improving the accuracy of theoretical predictions for LHC and FCC experiments.

Contribution

A new approach to remove divergences in fixed-order QCD corrections, enhancing the precision of predictions for collider physics.

Findings

Divergences are successfully removed in the proposed method.

The approach improves agreement with observed distributions.

Applicability demonstrated with Z and gamma production processes.

Abstract

With an eye toward the usual unphysical divergence of hard fixed-order corrections in predictions for the processes probed in high energy colliding hadron beam devices as one approaches the soft limit, we present a new approach to the realization of such corrections, with some emphasis on the LHC and the future FCC devices. We show that the respective divergence is removed in our approach. This means that we would render the standard results to be closer to the observed exclusive distributions. While we stress that the approach has general applicability, we use the single Z and virtual gamma production and decay to lepton pairs as our prototypical example. Accordingly, our work opens another part of the way to rigorous baselines for the determination of the theoretical precision tags for LHC physics, with an attendant generalization to the future FCC.