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

TL;DR

This paper revisits radiative corrections in proton-antiproton annihilation to electron-positron, providing formulas and a Monte Carlo integrator to improve measurements of time-like form factors at the PANDA experiment.

Contribution

It introduces a comprehensive calculation of radiative corrections and develops a Monte Carlo tool tailored for the PANDA experiment's analysis.

Findings

Formulas for radiative corrections are provided.

A stand-alone Monte Carlo integrator is developed.

Application to PANDA experiment demonstrates practical utility.

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.