Mixed modulus and anomaly mediation in light of the muon $g-2$ anomaly

TL;DR

This paper explores how mixed modulus-anomaly mediation in supersymmetry can address the muon g-2 anomaly, proposing a scenario where light electroweakinos and sleptons explain the observed discrepancy.

Contribution

It demonstrates that the KKLT scenario of mixed modulus-anomaly mediation can naturally produce light electroweakinos and sleptons consistent with the muon g-2 anomaly.

Findings

Light electroweakinos and sleptons can explain the muon g-2 discrepancy.

KKLT scenario predicts gaugino mass hierarchy compatible with observations.

Supersymmetric particles as bino-like neutralino or slepton are favored.

Abstract

The new measurement of the anomalous magnetic moment of muon at the Fermilab Muon $g-2$ experiment has strengthened the significance of the discrepancy between the standard model prediction and the experimental observation from the BNL measurement. If new physics responsible for the muon $g-2$ anomaly is supersymmetric, one should consider how to obtain light electroweakinos and sleptons in a systematic way. The gauge coupling unification allows a robust prediction of the gaugino masses, indicating that the electroweakinos can be much lighter than the gluino if anomaly-mediated supersymmetry breaking is sizable. As naturally leading to mixed modulus-anomaly mediation, the KKLT scenario is of particular interest and is found capable of explaining the muon $g-2$ anomaly in the parameter region where the lightest ordinary supersymmetric particle is a bino-like neutralino or slepton.