Testing new physics with the electron g − 2

By G. Giudice, P. Paradisi, M. Passera. 2012

158 citations recorded by the source corpus.

A bstractWe argue that the anomalous magnetic moment of the electron (ae) can be used to probe new physics. We show that the present bound on new-physics contributions to ae is 8 × 10−13, but the sensitivity can be improved by about an order of magnitude with new measurements of ae and more refined determinations of α in atomic-physics experiments. Tests on new-physics effects in ae can play a crucial role in the interpretation of the observed discrepancy in the anomalous magnetic moment of the muon (aμ). In a large class of models, new contributions to magnetic moments scale with the square of lepton masses and thus the anomaly in aμ suggests a new-physics effect in ae of (0.7 ± 0.2) × 10−13. We also present examples of new-physics theories in which this scaling is violated and larger effects in ae are expected. In such models the value of ae is correlated with specific predictions for processes with violation of lepton number or lepton universality, and with the electric dipole moment of the electron.

Subfields: Artificial Intelligence, Atomic and Molecular Physics, and Optics, Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/6a2ec7d7f2c76d7aa52d5a19e51a55b48668cef4

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Citations in the corpus

Limiting two-Higgs-doublet models (2014, background): “However, as discussed in [84], in the last few years the situation has been changing thanks”
The Dark Photon (2020, background): “The uncertainty on this difference (at 1σ) is given by (Giudice et al., 2012)”
A Call for New Physics : The Muon Anomalous Magnetic Moment and Lepton Flavor Violation (2016, background): “ive sensitivity to new physics is reduced by a factor of m2 =m 2 e˘40000. Nevertheless, there are specic cases in which the electron magnetic moment plays a complementary role to probe new physics [69, 70]. As for the tau magnetic moment [71, 72], which would, in principle, be an excellent probe fo”
Effective Lagrangian for a light Higgs-like scalar (2013, background): “In the lepton sector, the current measurements and SM predictions of the muon [43, 44] and electron [45, 46] anomalous magnetic moments and the limits on their EDMs [47–49] imply the following 95% probability bounds:”