The dijet cross section with a jet veto

TL;DR

This paper presents a resummation-based theoretical study of dijet production with a jet veto in proton-proton collisions, comparing predictions to ATLAS data and addressing energy-momentum conservation effects.

Contribution

It introduces a modified resummation approach that incorporates energy-momentum conservation, improving the accuracy of dijet cross section predictions with a jet veto.

Findings

Good agreement with ATLAS data on gap fraction

Resummation must include energy-momentum conservation for sensible results

Theoretical uncertainties remain large in the predictions

Abstract

We study dijet production in proton-proton collisions with a veto on the emission of a third jet in the rapidity region in between the two leading ones. We resum the leading logarithms in the ratio of the transverse momentum of the leading jets and the veto scale and we match this result to leading-order QCD matrix elements. We find that, in order to obtain sensible results, we have to modify the resummation and take into account energy-momentum conservation effects. We compare our theoretical predictions for the gap fraction to experimental data measured by the ATLAS collaboration and find good agreement, although our results are affected by large theoretical uncertainties. We then discuss differences and similarities of our calculation to other theoretical approaches.