부산대학교 도서관

Abstract The detection of a heavy neutral CP-even Higgs boson of the $$B-L$$ B - L Supersymmetric Standard Model (BLSSM), $$h'$$ h ′ , with $$m_{h'}\simeq 400~\text {GeV}$$ m h ′ ≃ 400 GeV , at the Large Hadron Collider (LHC) for a center-of-mass energy of $$\sqrt{s}=14~\text {TeV}$$ s = 14 TeV , is investigated. The following production and decay channels are considered: $$gg\rightarrow h'\rightarrow {ZZ}\rightarrow 4\ell $$ g g → h ′ → ZZ → 4 ℓ and (with being the Missing Transverse Energy (MET)), where $$\ell =e,\mu $$ ℓ = e , μ , with integrated luminosity $$L_{\text {int}}=300~{\text {fb}}^{-1}$$ L int = 300 fb - 1 (Run 3). Furthermore, we also look into the di-Higgs channel $$gg\rightarrow h'\rightarrow {hh}\rightarrow {b{\bar{b}}\gamma \gamma }$$ g g → h ′ → hh → b b ¯ γ γ at the High-Luminosity LHC (HL-LHC) with an integrated luminosity of $$L_{\text {int}}=3000~{\text {fb}}^{-1}$$ L int = 3000 fb - 1 . We demonstrate that promising signals with high signal-to-background statistical significance ( $$S/\sqrt{B}$$ S / B ) can be obtained through the three aforementioned channels.