High |t| diffractive photoproduction of vector mesons and photons at HERA

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作者
Janssen, X [1 ]
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[1] DESY, D-22607 Hamburg, Germany
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O412 [相对论、场论]; O572.2 [粒子物理学];
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摘要
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 gamma p -> gamma Y in which the outgoing photon has transverse momentum p(t(gamma)) > 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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页码:732 / 735
页数:4
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