Low energy SUSY confronted with new measurements of W-boson mass and muon g-2

TL;DR

This paper investigates whether the minimal supersymmetric standard model (MSSM) can simultaneously explain the recent W-boson mass and muon g-2 anomalies, finding a viable parameter space near current experimental limits.

Contribution

It provides the first comprehensive analysis showing MSSM can account for both anomalies within current experimental constraints, highlighting a specific compressed spectrum scenario.

Findings

MSSM can explain both anomalies at about 2σ level.

Favored parameter space involves a compressed bino, wino, and stau spectrum.

Predicted signals may be detectable in near-future LHC searches.

Abstract

The new CDF II measurement of $W$-boson mass shows a 7$\sigma$ deviation from the Standard Model (SM) prediction, while the recent FNAL measurement of the muon $g-2$ shows a 4.2$\sigma$ deviation (combined with the BNL result) from the SM. Both of them strongly indicate new physics beyond the SM. In this work we study the implication of both measurements on low energy supersymmetry. With an extensive exploration of the parameter space of the minimal supersymmetric standard model (MSSM), we find that in the parameter space allowed by current experimental constraints from colliders and dark matter detections, the MSSM can simultaneously explain both measurements on the edge of $2\sigma$ level, taking theoretical uncertainties into consideration. The favored parameter space, characterized by a compressed spectrum between bino, wino and stau, with the stop being around 1 TeV, may be covered in the near future LHC searches.