Measurement of Dijet Cross Sections in ep Interactions with a Leading Neutron at HERA

Details Measurement of Dijet Cross Sections in ep Interactions with a Leading Neutron at HERA Measurement of Dijet Cross Sections in ep Interactions with a Leading Neutron at HERA

2005-01-30

arxiv.org/abs/hep-ex/0501074v1

Eur.Phys.J.C41:273-286,2005

Physics

High Energy Physics

High Energy Physics - Experiment

27 pages, 9 figures, 5 tables

Scientific paper

10.1140/epjc/s2005-02227-8

Measurements are reported of the production of dijet events with a leading neutron in ep interactions at HERA. Differential cross sections for photoproduction and deep inelastic scattering are presented as a function of several kinematic variables. Leading order QCD simulation programs are compared with the measurements. Models in which the real or virtual photon interacts with a parton of an exchanged pion are able to describe the data. Next-to-leading order perturbative QCD calculations based on pion exchange are found to be in good agreement with the measured cross sections. The fraction of leading neutron dijet events with respect to all dijet events is also determined. The dijet events with a leading neutron have a lower fraction of resolved photon processes than do the inclusive dijet data.

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