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Dortmund 2006 – scientific programme

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T: Teilchenphysik

T 301: QCD Experiment

T 301.5: Talk

Tuesday, March 28, 2006, 17:40–17:55, HG2-HS2

Forward jet production in deep inelastic scattering with ZEUS detector at HERA — •N. Vlasov, A. Bamberger, and D. Dobur — Physikalisches Institut der Universität Freiburg, Hermann-Herder-Str.3, 79104 Freiburg, Germany

Jet cross sections in neutral current deep inelastic scattering at low Bjorken-x and large pseudorapidity, towards the proton direction, have been measured with the ZEUS detector at HERA using an integrated luminosity of 81.8 pb−1. Hadronic final-state measurements in this region are expected to be particularly sensitive to QCD evolution effects. In comparison to previous ZEUS measurements, the phase-space acceptance has been extended in pseudorapidity to ηjet < 4.3. The measurements have been compared with leading-logarithm parton-shower Monte Carlo models and next-to-leading-order QCD calculations. The measurements show a clear deviation from the predictions of the models considered here.

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