Nonperturbative effects in triple-differential dijet and Z+jet production at the LHC

TL;DR

This paper investigates nonperturbative effects in dijet and Z+jet production at the LHC using Monte Carlo simulations, highlighting process-dependent differences and proposing a new measurement to better understand these effects.

Contribution

It provides a detailed analysis of nonperturbative effects on key collider processes and suggests a novel measurement approach for Z+jet events.

Findings

Significant process-dependent differences in nonperturbative effects.

Non-universality of nonperturbative effects remains an open question.

Proposal for a triple-differential measurement of the underlying event.

Abstract

In comparisons of precision measurements at colliders to the most accurate predictions available in perturbative quantum chromodynamics (QCD), it is required to correct for nonperturbative effects. By means of Monte Carlo event generators this article investigates the impact of such nonperturbative effects on two processes relevant for precision determinations of the strong coupling constant and the proton structure: triple-differential dijet and Z+jet production. We observe significant differences between the two processes. Whether this non-universal behaviour is realized in nature remains an open question. We therefore propose a triple-differential measurement of the underlying event in Z+jet production.