Abstract
The impact of nonlinear effects in the deeply virtual Compton scattering (DVCS) process that will be measured in future electron-hadron collisions is investigated. We present, for the first time, the predictions derived using the solution to the Balitsky–Kovchegov equation with the collinearly-improved kernel and including the impact-parameter dependence. We estimate the total cross section and t-distribution of the DVCS process in ep and eA collisions and demonstrate that dsigma /dt is strongly dependent on the assumption for the impact-parameter dependence of the dipole-hadron scattering amplitude. Our results indicate that a future experimental analysis of this process will be useful to discriminate among different models for the saturation physics and, consequently, will allow us to constrain the description of QCD dynamics in parton densities.
Highlights
Wherein the hadron remains intact after scattering of the lepton probe
Our results indicate that a future experimental analysis of this process will be useful to discriminate among different models for the saturation physics and, will allow us to constrain the description of QCD dynamics in parton densities
The study of the deeply virtual Compton scattering is predicted to be a probe of the gluon Wigner distribution
Summary
Wherein the hadron remains intact after scattering of the lepton probe. One has that the Fourier transform of the associated differential cross sections dσ/dt, where t is the squared four-momentum transfer between the incoming and scattered hadron, can be used to obtain the transverse spatial distributions of quarks and gluons in both protons and nuclei. We will focus on coherent DVCS processes represented, i.e. production of a real photon with the target hadron remaining intact.. We will focus on coherent DVCS processes represented, i.e. production of a real photon with the target hadron remaining intact.1 At large energies, this process is driven by the gluon content of the target, with the cross section being proportional to the square of the scattering amplitude and, being strongly sensitive to the underlying QCD dynamics. This process is characterized by a real photon and an intact hadron in the final state, with a rapidity gap separating these systems.
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