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Diffractive Photoproduction of Jets at HERA |
| Reference |
N.N., to be presented at ICHEP 2002, Summer 2002 |
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| Contact |
S.Schaetzel,F.Eisele |
| Abstract |
Diffractive parton densities extracted from diffractive deep-inelastic ep-scattering (DIS) at HERA fail to describe diffractive hard p pbar-scattering at the Tevatron. Due to the presence of both point-like (direct) and hadron-like (resolved) photon couplings, photoproduction provides a transition between DIS and hadron collisions and can reveal the underlying mechanism of factorization breaking. A new measurement is presented of single and double differential dijet cross sections in low-|t| diffractive photoproduction processes. Dijet events are identified using the inclusive k_T cluster algorithm. The cross sections, corresponding to the kinematic range 164 < W < 232 GeV, xpom < 0.05, E_T^{jet(1)} > 5 GeV and E_T^{jet(2)} > 4 GeV, are confronted with predictions based on diffractive parton distributions obtained in diffractive DIS at HERA and with Soft Colour Interaction models. |
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