2023/03/04 by Yangle He, Lei Meng, He, Yangle +5
Computer Science · Physics and Astronomy · #Computational Physics and Python Applications #Dark Matter and Cosmic Phenomena #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #Particle physics theoretical and experimental studies
paper · pdf · doi:10.48550/arxiv.2303.02360
openalex publication_date 2023/03/04 · openalex created_date 2023/03/09 · openalex updated_date 2026/07/28
Motivated by the recent measurement of muon anomalous magnetic moment at Fermilab, the rapid progress of the LHC search for supersymmetry, and the significantly improved sensitivities of dark matter direct detection experiments, we studied their impacts on the Minimal Supersymmetric Standard Model (MSSM). We conclude that higgsino mass should be larger than about 500~\rm GeV for M1 < 0 and 630~\rm GeV for M1 > 100~\rm GeV, where M1 denotes the bino mass. These improved bounds imply a tuning of \calO(1%) to predict the Z-boson mass and simultaneously worsen the naturalness of the Z- and h-mediated resonant annihilations to achieve the measured dark matter density. We also conclude that the LHC restrictions have set lower bounds on the sparticle mass spectra: mχ10 \gtrsim 210~\rm GeV, mχ20, mχ1^± \gtrsim 235~\rm GeV, mχ30 \gtrsim 515~\rm GeV, mχ40 \gtrsim 525~\rm GeV, mχ2^± \gtrsim 530~\rm GeV, mνμ \gtrsim 235~\rm GeV, mμ1 \gtrsim 215~\rm GeV, and mμ2 \gtrsim 250~\rm GeV, where χ20 and χ1^± are wino-dominated when they are lighter than about 500~\rm GeV. These bounds are far beyond the reach of the LEP experiments in searching for supersymmetry and have not been acquired before. In addition, we illuminate how some parameter spaces of the MSSM have been tested at the LHC and provide five scenarios in which the theory coincides with the LHC restrictions. Once the muon g-2 anomaly is confirmed to originate from supersymmetry, this research may serve as a guide to explore the characteristics of the MSSM in future experiments.