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arXiv · hep-ex/0502029

Forward jet production in deep inelastic ep scattering and low-x parton dynamics at HERA

ZEUS Collaboration
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Abstract

Differential inclusive jet cross sections in neutral current deep inelastic ep scattering have been measured with the ZEUS detector. Three phase-space regions have been selected in order to study parton dynamics where the effects of BFKL evolution might be present. The measurements have been compared to the predictions of leading-logarithm parton shower Monte Carlo models and fixed-order perturbative QCD calculations. In the forward region, QCD calculations at order alpha_s^1 underestimate the data up to an order of magnitude at low x. An improved description of the data in this region is obtained by including QCD corrections at order alpha_s^2, which account for the lowest-order t-channel gluon-exchange diagrams, highlighting the importance of such terms in parton dynamics at low x.

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ZEUS Collaboration. 2005-02-16. Forward jet production in deep inelastic ep scattering and low-x parton dynamics at HERA. https://doi.org/10.1016/j.physletb.2005.09.066

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