Physics – High Energy Physics – High Energy Physics - Experiment
Scientific paper
1999-05-26
Eur.Phys.J.C12:53-68,2000
Physics
High Energy Physics
High Energy Physics - Experiment
26 pages including 10 figures (submitted to Eur. J. Phys. C)
Scientific paper
10.1007/s100529900245
Correlations between charged particles in deep inelastic ep scattering have been studied in the Breit frame with the ZEUS detector at HERA using an integrated luminosity of 6.4 pb-1. Short-range correlations are analysed in terms of the angular separation between current-region particles within a cone centred around the virtual photon axis. Long-range correlations between the current and target regions have also been measured. The data support predictions for the scaling behaviour of the angular correlations at high Q2 and for anti-correlations between the current and target regions over a large range in Q2 and in the Bjorken scaling variable x. Analytic QCD calculations and Monte Carlo models correctly describe the trends of the data at high Q2, but show quantitative discrepancies. The data show differences between the correlations in deep inelastic scattering and e+e- annihilation.
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