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

TL;DR

This paper investigates whether the B-L supersymmetric model can explain the observed 95 GeV excesses in diphoton and b-bbar data, highlighting the importance of two-loop corrections for accurate modeling.

Contribution

It demonstrates that the B-LSSM can simultaneously accommodate the 95 GeV excesses within 2σ intervals when including two-loop effective potential corrections.

Findings

B-LSSM struggles to fit 125 GeV Higgs and 95 GeV excesses within 1σ.

Two-loop corrections are crucial for accurate Higgs mass predictions.

The model can reproduce the excesses within 2σ intervals with proper parameter choices.

Abstract

Motivated by the excesses around 95 GeV observed in the diphoton and $b\bar b$ data, this study focuses on investigating these two excesses within the framework of the $B-L$ supersymmetric model (B-LSSM), due to the existence of two light Higgs bosons in the model. Considering the two-loop effective potential corrections, it is found that the B-LSSM is hard to fit the 125 GeV Higgs signal strengths and the two excesses around 95 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.