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High Energy Physics - Phenomenology

arXiv:2606.27600 (hep-ph)
[Submitted on 25 Jun 2026]

Title:Radiative Corrections in Bound States: Recent Results

Authors:Andrzej Czarnecki, Artem O. Davydov
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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.
Comments: Contribution to Proceedings of Loops and Legs in Quantum Field Theory (LL2026)
Subjects: High Energy Physics - Phenomenology (hep-ph)
Cite as: arXiv:2606.27600 [hep-ph]
  (or arXiv:2606.27600v1 [hep-ph] for this version)
  https://doi.org/10.48550/arXiv.2606.27600

Submission history

From: Andrzej Czarnecki [view email]
[v1] Thu, 25 Jun 2026 23:14:02 UTC (57 KB)
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