The Tiny (g-2) Muon Wobble from Small-$μ$ Supersymmetry – on April 7, 2021 at 9:56 am

A new measurement of the muon anomalous magnetic moment has been recently
reported by the Fermilab Muon g-2 collaboration and shows a $4.2,sigma$
departure from the most precise and reliable calculation of this quantity in
the Standard Model. Assuming that this discrepancy is due to new physics, we
consider its relation with other potential anomalies, especially in the muon
sector, as well as clues from the early universe. We comment on new physics
solutions discussed extensively in the literature in the past decades, to
finally concentrate on a simple supersymmetric model that also provides a dark
matter explanation. We show results for an interesting region of supersymmetric
parameter space that can be probed at the high luminosity LHC and future
colliders, while leading to values of ($g_mu-2$) consistent with the Fermilab
and Brookhaven ($g_mu-2$) measurements. Such a parameter region can
simultaneously realize a Bino-like dark matter candidate compatible with direct
detection constraints for small to moderate values of the Higgsino mass
parameter $|mu|$.
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