Radiative Corrections in Bound States: Recent Results

Andrzej Czarnecki; Artem O. Davydov

Radiative Corrections in Bound States: Recent Results

High Energy Physics - Phenomenology 2026-06-25 v1

Authors: Andrzej Czarnecki , Artem O. Davydov

Abstract

Two recent studies of radiative corrections to bound state properties are discussed. The change of the decay rate of a muon bound to a light nucleus has been calculated for several light nuclei $4\leq Z \leq 9$ with high precision, resolving a long-standing discrepancy between analytical and numerical results for oxygen ( $Z=8$ ). The decay of parapositronium into three photons has been calculated including effects of the $Z$ boson. The resulting rate is many orders of magnitude smaller than previously estimated.

Keywords

radiative corrections bound states muon decay parapositronium Z boson precision calculation

Cite

@article{arxiv.2606.27600,
  title  = {Radiative Corrections in Bound States: Recent Results},
  author = {Andrzej Czarnecki and Artem O. Davydov},
  journal= {arXiv preprint arXiv:2606.27600},
  year   = {2026}
}

Comments

Contribution to Proceedings of Loops and Legs in Quantum Field Theory (LL2026)