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

Abstract

This study investigates the excesses observed in the diphoton and $b\bar{b}$ data around $95\mathrm{GeV}$ 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 $95\mathrm{GeV}$. Considering the two-loop effective potential corrections, it is found that the B-LSSM is hard to fit the $125\mathrm{GeV}$ Higgs signal strengthes and the two excesses around $95\mathrm{GeV}$ in the experimental $1\sigma$ intervals, while the model can reproduce them in the experimental $2\sigma$ intervals simultaneously. And considering the two-loop effective potential corrections to the squared Higgs mass matrix is important to account for the mixing effects among Higgs sector.

arXiv comment29 pages, 5 figures