Forward Jet Production in Deep Inelastic Scattering at HERA

TL;DR

This paper reports measurements of forward jet production in deep inelastic scattering at HERA, comparing experimental results with next-to-leading order QCD calculations and models to enhance understanding of QCD dynamics.

Contribution

It provides detailed differential cross section measurements for forward jets and di-jet systems in deep inelastic scattering, testing QCD predictions in a new kinematic regime.

Findings

Measurements agree with NLO QCD in some regions

Discrepancies observed at low x_{Bj} and high p_{t,jet}^2

Data constrain QCD-based models' accuracy

Abstract

The production of forward jets has been measured in deep inelastic ep collisions at HERA. The results are presented in terms of single differential cross sections as a function of the Bjorken scaling variable (x_{Bj}) and as triple differential cross sections d^3 \sigma / dx_{Bj} dQ^2 dp_{t,jet}^2, where Q^2 is the four momentum transfer squared and p_{t,jet}^2 is the squared transverse momentum of the forward jet. Also cross sections for events with a di-jet system in addition to the forward jet are measured as a function of the rapidity separation between the forward jet and the two additional jets. The measurements are compared with next-to-leading order QCD calculations and with the predictions of various QCD-based models.