https://doi.org/10.1140/epjc/s10052-022-10242-y
Regular Article - Theoretical Physics
Can electron and muon 
anomalies be jointly explained in SUSY?
1
CAS Key Laboratory of Theoretical Physics, Institute of Theoretical Physics, Chinese Academy of Sciences, 100190, Beijing, China
2
School of Physics Sciences, University of Chinese Academy of Sciences, 100049, Beijing, China
Received:
2
December
2021
Accepted:
23
March
2022
Published online:
30
March
2022
The FNAL+BNL measurements for muon is 
above the SM prediction, and the Berkeley 
Cs measurement for the fine-structure constant 
leads to the SM prediction for electron which is 
above the experimental value. Hence, a joint explanation of both anomalies requires a positive contribution to muon and a negative contribution to electron , which is rather challenging. In this work we explore the possibility of such a joint explanation in the minimal supersymmetric standard model (MSSM). Assuming no universality between smuon and selectron soft masses, we find out a part of parameter space for a joint explanation at 
level, i.e., 
, 
GeV, 
being much larger than the soft masses of other sleptons, 
GeV and 
GeV. This part of parameter space can survive LHC and LEP constraints, but gives an over-abundance for dark matter if the bino-like lightest neutralino is assumed to be the dark matter candidate. With the assumption that the dark matter candidate is a superWIMP (say a pseudo-goldstino in multi-sector SUSY breaking scenarios, whose mass can be as light as GeV and produced from the late-decay of the thermally freeze-out lightest neutralino), the dark matter problem can be avoided. So, we conclude that the MSSM may give a joint explanation for the muon and electron anomalies at level (the muon anomaly can be even ameliorated to 
).
© The Author(s) 2022
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