The radiative corrections to double-Dalitz decays revisited

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

Comments: 22 pages, 9 figures; minor changes added (results unchanged). Matches the published version in PRD. Results in Mathematica notebooks added as ancillary files