Radiative effects in deep virtual Compton scattering

TL;DR

This paper calculates radiative corrections and asymmetries in deep virtual Compton scattering, providing computational tools and numerical results relevant for current Jefferson Laboratory experiments.

Contribution

It introduces a leading log approximation calculation of radiative effects and provides Fortran code and Monte Carlo tools for experimental analysis.

Findings

Radiative corrections significantly affect cross sections and asymmetries.

Numerical estimates align with current Jefferson Laboratory experimental conditions.

Tools developed facilitate future experimental data analysis.

Abstract

Radiative corrections to the cross sections of photon electroproduction and the single spin asymmetries induced by the interference between the Bethe Heitler and deep virtual Compton scattering amplitudes are calculated within the leading log approximation. The deep virtual Compton scattering amplitude is presented in the Belitsky, M\"uller, and Kirchner approximation for the polarized initial particles. The Fortran code for estimation of the radiative effects in a given kinematic point and Monte Carlo generator for simulation of one or two photons are developed. Numerical results are performed for beam-spin asymmetries in kinematical conditions of current experiments in the Jefferson Laboratory.