Diffractive Exclusive Photon Production in DIS at HERA

Abstract

We demonstrate that perturbative QCD allows one to calculate the absolute cross section of diffractive exclusive production of photons at large $Q^2$ at HERA, while the aligned jet model allows one to estimate the cross section for intermediate $Q^2\sim 2Ge{V}^2$. Furthermore, we find that the imaginary part of the amplitude for the production of real photons is larger than the imaginary part of the corresponding DIS amplitude by about a factor of 2, leading to the prediction of a significant counting rate for the current generation of experiments at HERA. We also find a large azimuthal angle asymmetry in $ep$ scattering for HERA kinematics which allows one to directly measure the real part of the DVCS amplitude and hence the nondiagonal parton distributions.

28 pages, 11 figures, published version with incorporated erratum

References in corpus (5)

• Nonforward Parton Distributions
• Nondiagonal Parton Distributions in the Leading Logarithmic Approximation
• The effect of off-diagonal parton distributions in diffractive vector meson electroproduction
• On the Evolution Kernels of Twist 2 Light-Ray Operators for Unpolarized and Polarized Deep Inelastic Scattering
• Proton Dissociative Rho and Elastic Phi Electroproduction at HERA

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