QED radiative effects in the processes of exclusive photon electroproduction from polarized protons with the next-to-leading accuracy

Journal Article · Fri Aug 01 00:00:00 EDT 2014 · Physical Review D

DOI:https://doi.org/10.1103/PhysRevD.90.033001· OSTI ID:1148711

Akushevich, Igor V. ^[1]; Ilyichev, Alexander ^[2]; Shumeiko, Nikolai M ^[2]

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1. Duke University, JLAB
2. Byelorussian State University

Radiative effects in the electroproduction of photons in polarized ep-scattering are calculated with the next-to-leading (NLO) accuracy. The contributions of loops and two photon emission were presented in analytical form. The covariant approach of Bardin and Shumeiko was used to extract the infrared divergence. All contributions to the radiative correction were presented in the form of the correction to the leptonic tensor thus allowing for further applications in other experiments, e.g., deep inelastic scattering. The radiative corrections (RC) to the cross sections and polarization asymmetries were analyzed numerically for kinematical conditions of the current measurement at Jefferson Lab. Specific attention was paid on analyzing kinematical conditions for the process with large radiative effect when momenta of two photons in the final state are collinear to momenta of initial and final electrons, respectively.

• Research Organization: Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
• Sponsoring Organization: USDOE Office of Science (SC), Nuclear Physics (NP)
• DOE Contract Number: AC05-06OR23177
• OSTI ID: 1148711
• Report Number(s): JLAB-PHY-14-1845; DOE/OR/23177-3032; arXiv:1403.3421
• Journal Information: Physical Review D, Vol. 90, Issue 03
• Country of Publication: United States
• Language: English