Volume 521 - Loops and Legs in Quantum Field Theory (LL2026) - Parallel 5B
Radiative Corrections in Bound States: Recent Results
A. Czarnecki* and A.O. Davydov
*: corresponding author
Full text: pdf
Published on: September 24, 2026
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.
DOI: https://doi.org/10.22323/1.521.0092
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