The Tiny (g-2) Muon Wobble from Small-$\mu$ Supersymmetry

TL;DR

This paper explores a supersymmetric model that explains the muon g-2 anomaly and dark matter, predicting new particles accessible at future colliders and direct detection experiments.

Contribution

It introduces a novel supersymmetric parameter space region that accounts for muon g-2 and dark matter, with testable predictions for upcoming experiments.

Findings

A supersymmetric model explains muon g-2 discrepancy.

Predicted light Higgsinos and Higgs bosons accessible at colliders.

Benchmark scenarios for future dark matter detection.

Abstract

A new measurement of the muon anomalous magnetic moment has been 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 concentrate on a simple supersymmetric model that also provides a dark matter explanation in a previously unexplored region of supersymmetric parameter space. Such interesting region can realize a Bino-like dark matter candidate compatible with all current direct detection constraints for small to moderate values of the Higgsino mass parameter $|\mu|$. This in turn would imply the existence of light additional Higgs bosons and Higgsino particles within reach of the high-luminosity LHC and future colliders. We provide benchmark scenarios that will be tested in the next generation of direct dark matter experiments and at the LHC.