Explaining the possible 95 GeV excesses in the $B-L$ symmetric SSM

This study investigates the excesses observed in the diphoton and b b data around 95\; GeV within the framework of the $B-L$ supersymmetric model (B-LSSM). Comparing with the minimal supersymmetric standard model, the B-LSSM incorporates two singlet chiral Higgs bosons which mix with the SM-like Higgs boson due to the gauge kinetic mixing effect. The richer Higgs sector indicates that designating the B-LSSM specific CP-even Higgs state as the lightest Higgs boson has great potential to explain the excesses at around 95\; GeV. Considering the two-loop effective potential corrections to the squared Higgs mass matrix, it is found that the signal strengthes μ(h₉₅)γγ, μ(h₉₅)b b can be described simultaneously in the experimental 1σ interval. And the B-LSSM specific parameters tanβ', B_η, gYB, MZ' affect the theoretical predictions on the light Higgs boson masses and signal strengthes μ(h₉₅)γγ, μ(h₉₅)bb significantly.