Radiative corrections for the decay $\Sigma^0\to\Lambda e^+e^-$

TL;DR

This paper calculates QED radiative corrections for the decay b1a0a0b4a0b3a0e+e-, considering the full phase space and transition form factors, to improve understanding of nucleon structure and decay dynamics.

Contribution

It provides a comprehensive evaluation of radiative corrections beyond the soft-photon approximation for the decay b1a0a0b4a0b3a0e+e-, covering the entire Dalitz plot without energy restrictions.

Findings

Radiative corrections are significant in the decay analysis.

The full phase space calculation improves accuracy over soft-photon approximation.

Results aid in precise extraction of electromagnetic form factors.

Abstract

Electromagnetic form factors serve to explore the intrinsic structure of nucleons and their strangeness partners. For the decay $\Sigma^0\to\Lambda e^+e^-$, due to limited phase space, the effects caused by the Sigma-to-Lambda transition form factors compete with the QED radiative corrections. These corrections are addressed in the present work, evaluated beyond the soft-photon approximation, i.e., over the whole range of the Dalitz plot and with no restrictions on the energy of the radiative photon.