Manifestly covariant analysis of the QED Compton processin ep→ e γ p and e p → e γ X

2003/06/27 by A. Mukherjee, C. Pisano · 1 citation
Physics and Astronomy · #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ph

paper · pdf · doi:10.1140/epjc/s2003-01308-0

published as Eur.Phys.J.C30:477-486,2003 · 22 pages, 4 figures, 2 tables

arxiv created 2003/06/27 · openalex publication_date 2003/10/01 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28

Abstract

We calculate the unpolarized QED Compton scattering cross section in a manifestly covariant way. Our approach allows a direct implementation of the specific kinematical cuts imposed in the experiments, \it e. g. HERA-H1. We compare the 'exact' cross section in terms of the structure functions F_1,2 (x_B,Q²), assuming the Callan-Gross relation, with the one obtained using the equivalent photon approximation (EPA) as well as with the experimental results. We find that the agreement with the EPA is better in x_γ bins, where x_γ is the fraction of the longitudinal momentum of the proton carried by the virtual photon, compared to the bins in the leptonic variable x_l.

Citations

• Delineating the polarized and unpolarized photon distributions of the nucleon in eN collisions

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