Three-loop corrections to lamb shift in positronium: Electron factor and polarization
نویسندگان
چکیده
Hard spin-independent three-loop radiative contributions to energy levels in positronium generated by the two-photon-exchange diagrams with one-loop insertions fermion lines and exchanged photons are calculated. This is a next step calculations of all corrections order mα7 inspired new generation precise 1S−2S 2S−2P measurements positronium.
منابع مشابه
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ژورنال
عنوان ژورنال: Physics Letters B
سال: 2022
ISSN: ['0370-2693', '1873-2445']
DOI: https://doi.org/10.1016/j.physletb.2022.137247