Regular Article - Theoretical Physics
A dark leptophilic scalar with the updated muon anomaly
School of Science, Southwest University of Science and Technology, 621010, Mianyang, China
Accepted: 13 March 2022
Published online: 13 April 2022
The muon anomaly was strengthened by recent experimental results at Fermilab, which may be signatures of new physics. A scenario of leptophilic scalar accounting for the muon anomaly is investigated in this paper. Although a light mainly decaying into standard model (SM) particles has been excluded by experiments, a dark leptophilic scalar predominantly decaying into invisible fermionic dark matter (DM) is still allowed. Considering the decay mode opened (here ), the coupling preferred by the muon and the coupling are derived. The light/heavy (roughly 1 GeV as a benchmark value) can be tested by future experiments via DM/SM decay modes, and the contribution of to the anomalous magnetic moment of the tau lepton could be investigated at lepton colliders. The search for via -electron scattering in direct detection of DM is not sensitive due to a tiny -electron coupling, especially for .
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