https://doi.org/10.1140/epjd/s10053-023-00779-2
Regular Article – Atomic Physics
On the positronium g-factor
1
CNRS, LNCMI UPR 3228 (UGA, UT3, INSA-T, EMFL), 31400, Toulouse Cedex, France
2
Université Toulouse 3, LNCMI UPR CNRS 3228 (UGA, INSA-T, EMFL), 31400, Toulouse Cedex, France
3
Institute for Nuclear Research and Nuclear Energy, Bulgarian Academy of Sciences, Blvd. Tsarigradsko ch. 72, 1142, Sofia, Bulgaria
Received:
5
June
2023
Accepted:
30
October
2023
Published online:
10
November
2023
In this letter, we recall the main facts concerning the g-factor of positronium and we show how the value of the g-factor of the positronium is important. Taking it better into consideration may provide a solution to the reported discrepancy between QED theory and experiments concerning the hyperfine splitting of the fundamental level of the positronium. We also give the only experimental value that existing experiments can provide, 
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© The Author(s), under exclusive licence to EDP Sciences, SIF and Springer-Verlag GmbH Germany, part of Springer Nature 2023. Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
