The radiative corrections to double-Dalitz decays revisited

TL;DR

This paper revisits and refines the next-to-leading order radiative corrections to pseudoscalar double-Dalitz decays, highlighting their importance for accurately extracting transition form factors and exploring the double-virtual regime.

Contribution

It provides a complete recalculation of radiative corrections within the soft-photon approximation, improving previous results and emphasizing their relevance for form factor studies.

Findings

Small differences found compared to previous corrections

Refined corrections impact form factor extraction

Potential to test double-virtual transition form factors

Abstract

In this study, we revisit and complete the full next-to-leading order corrections to pseudoscalar double-Dalitz decays within the soft-photon approximation. Comparing to the previous study, we find small differences, which are nevertheless relevant for extracting information about the pseudoscalar transition form factors. Concerning the latter, these processes could offer the opportunity to test them-for the first time-in their double-virtual regime