95 GeV excesses in the Z3 -symmetric next-to-minimal supersymmetric standard model

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Recent analyses by CMS and ATLAS suggest a deviation in the diphoton channel at approximately 95 GeV, alongside a previously observed excess in bb¯ signals at a similar mass by the Large Electron-Positron collider, potentially hinting at a new scalar particle. This study explores this possibility within the framework of the Z3-symmetric next-to-minimal supersymmetric standard model. A comprehensive parameter scan was conducted, integrating constraints from dark matter relic density, direct detection experiments, and the properties of the observed 125 GeV Higgs boson. The results demonstrate that the model can accommodate the observed excesses with a singlet-dominated CP-even scalar boson near 95 GeV. The model accurately predicts signal strengths of the diphoton and bb¯ channels at a level of 1σ. Furthermore, it accounts for the measured dark matter relic abundance through bino-dominated neutralinos coannihilation with winolike electroweakinos, all while remaining consistent with existing Large Hadron Collider (LHC) constraints. These findings pave the way for future validation at the high-luminosity LHC and linear colliders, which may offer crucial tests of the model’s predictions. Published by the American Physical Society 2024