Searching for a Heavy Neutral CP-Even Higgs Boson in the BLSSM at the LHC Run 3 and HL-LHC

The detection of a heavy neutral CP-even Higgs boson of the B-L Supersymmetric Standard Model (BLSSM), h', with m_h'≃ 400 GeV, at the Large Hadron Collider (LHC) for a center-of-mass energy of √(s)=14 TeV, is investigated. The following production and decay channels are considered: gg→ h'→ZZ→4ℓ and gg→ h'→W^+W^-→2ℓ+E_T (with E_T being the Missing Transverse Energy (MET)), where ℓ=e,μ, with integrated luminosity L_int=300 fb^-1 (Run 3). Furthermore, we also look into the di-Higgs channel gg→ h'→hh→bb̅γγ at the High-Luminosity LHC (HL-LHC) with an integrated luminosity of L_int=3000 fb^-1. We demonstrate that promising signals with high statistical significance can be obtained through the three aforementioned channels.