QCD predictions for polarised deep inelastic scattering accompanied by a forward jet in the low x region of possible HERA measurements

Physics – High Energy Physics – High Energy Physics - Phenomenology

Scientific paper

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9 pages, latex, 3 figures

Scientific paper

10.1016/S0370-2693(99)01338-6

We estimate the cross-section and asymmetry relevant for the production of forward jets in polarised deep inelastic scattering in the region of small values of $x$ which can be probed at possible polarised HERA measurements. The kinematical cuts implemented in our analysis are the same as those which were used in the unpolarised deep inelastic scattering at HERA. The calculations are based on the double ln^2(1/x) resummation which controls the polarised deep inelastic scattering for small values of the Bjorken parameter x. We show that this resummation substantially enhances the corresponding cross-section and asymmetry. The predicted value of the asymmetry is found to vary between -0.01 and -0.04 within the small x region which can possibly be probed at polarised HERA measurements.

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