Light scalars with lepton number to solve the (g-2)e anomaly

Susan Gardner, Xinshuai Yan

Research output: Contribution to journalArticlepeer-review

11 Scopus citations


Scalars that carry lepton number can help mediate would-be lepton number-violating processes, such as neutrinoless double β decay or lepton scattering-mediated nucleon-antinucleon conversion. Here, we show that such new scalars can also solve the anomaly in precision determinations of the fine-structure constant α from atom interferometry and from the electron's anomalous magnetic moment, ae(g-2)e/2, by reducing |ae|. Study of the phenomenological constraints on these solutions favor a doubly charged scalar with mass below the GeV scale. Significant constraints arise from the measurement of the parity-violating asymmetry in Møller scattering, and we consider the implications of the next-generation MOLLER experiment at Jefferson Laboratory and of an improved ae measurement.

Original languageEnglish
Article number075016
JournalPhysical Review D
Issue number7
StatePublished - Oct 2020

Bibliographical note

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© 2020 authors.

ASJC Scopus subject areas

  • Nuclear and High Energy Physics


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