High |t| Diffractive Photoproduction of Vector Mesons and Photons at Hera

Details High |t| Diffractive Photoproduction of Vector Mesons and Photons at Hera High |t| Diffractive Photoproduction of Vector Mesons and Photons at Hera

Apr 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005iche.conf..732j&link_type=abstract

HIGH ENERGY PHYSICS, ICHEP 2004. Proceedings of the 32nd International Conference. Held 16-22 August 2004 in Beijing, China. Edi

Physics

High Energy Physics

Scientific paper

Diffractive vector meson photoproduction measurements from H1 and ZEUS are presented in which the magnitude of the four-momentum transfer squared |t| at the proton vertex is large. H1 has also studied the process γp → γY in which the outgoing photon has transverse momentum pt(γ) > 2 GeV and there is a large rapidity gap between the proton dissociation system Y and the outgoing photon. In both cases, the large transverse momentum transfer ensures that perturbative QCD can be applied. The results are compared to predictions from perturbative QCD models based on the leading logarithmic approximation of the BFKL evolution equation.

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