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- W4286880158 abstract "We show how light scalar fields can account for the discrepancy between the theoretical and observed values of the anomalous magnetic moment of the (anti)muon. When coupled to both matter and photons, light scalar fields induce a change of the anomalous magnetic moment of charged particles. This arises from two concurrent effects. Classically, light scalars induce a change of the cyclotron frequency, complementing the electromagnetic effects coming from the magnetic and electric fields used experimentally. Light scalars also contribute to the anomalous magnetic moment quantum mechanically at the one-loop level. For unscreened scalar fields coupling with a Yukawa interaction to matter, these contributions are negligible after applying the Cassini bound on deviations from Newtonian gravity. On the other hand, screened scalars such as chameleons or symmetrons can couple strongly to matter in the laboratory and decouple in the Solar System. This allows us to probe branches of their parameter spaces where the recently measured anomalous magnetic moment of the (anti)muon can be accounted for in the chameleon and symmetron cases. This might be a hint that modified gravity is at play in the laboratory." @default.
- W4286880158 created "2022-07-25" @default.
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- W4286880158 date "2021-11-01" @default.
- W4286880158 modified "2023-09-29" @default.
- W4286880158 title "Muon $g-2$ and Screened Modified Gravity" @default.
- W4286880158 doi "https://doi.org/10.48550/arxiv.2111.01188" @default.
- W4286880158 hasPublicationYear "2021" @default.
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