Eur. Phys. J. A (2020) 56: 58
https://doi.org/10.1140/epja/s10050-020-00063-6

Special Article – New Tools and Techniques

Radiative corrections in proton–antiproton annihilation to electron–positron and their application to the PANDA experiment

Radiative corrections to

¹ Joint Institute for Nuclear Research, 141980, Dubna, Russia
² Francisk Skorina Gomel State University, 246019, Gomel, Belarus
³ Helmholtz Institute Mainz, Staudingerweg 18, 55128, Mainz, Germany
⁴ CEA, IRFU, SPhN, Saclay, 91191, Gif-sur-Yvette, France

^* e-mail: egle.tomasi@cea.fr

Received: 11 November 2019
Accepted: 27 December 2019
Published online: 14 February 2020

Abstract

Radiative corrections to the annihilation of proton–antiproton into electron–positron are revisited, including virtual and real (soft and hard) photon emission. This issue is relevant for the time-like form factors measurements planned at the PANDA experiment at the FAIR facility, in next future. The relevant formulas are given. A stand-alone Monte-Carlo integrator is developed on the basis of the calculated radiative cross section and its application to the PANDA experiment is illustrated.