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

TL;DR

This paper investigates the potential to discover a heavy neutral CP-even Higgs boson predicted by the BLSSM at the LHC, analyzing multiple decay channels at different luminosities to assess detection prospects.

Contribution

It provides a detailed analysis of the detectability of the $h'$ Higgs boson in various decay channels at LHC Run 3 and HL-LHC, highlighting promising signals for future searches.

Findings

High statistical significance signals are achievable in multiple channels.

Detection prospects improve with increased luminosity.

Certain decay channels offer better sensitivity for $h'$ discovery.

Abstract

The detection of a heavy neutral CP-even Higgs boson of the $B-L$ Supersymmetric Standard Model (BLSSM), $h'$, with $m_{h'}\simeq 400~\text{GeV}$, at the Large Hadron Collider (LHC) for a center-of-mass energy of $\sqrt{s}=14~\text{TeV}$, is investigated. The following production and decay channels are considered: $gg\to h'\to{ZZ}\to4\ell$ and $gg\to h'\to{W^+W^-}\to2\ell+\slashed{E}_T$ (with $\slashed{E}_T$ being the Missing~Transverse~Energy~(MET)), where $\ell=e,\mu$, with integrated luminosity $L_{\text{int}}=300~{\text{fb}}^{-1}$ (Run 3). Furthermore, we also look into the di-Higgs channel $gg\to h'\to{hh}\to{b\bar{b}\gamma\gamma}$ at the High-Luminosity LHC (HL-LHC) with an integrated luminosity of $L_{\text{int}}=3000~{\text{fb}}^{-1}$. We demonstrate that promising signals with high statistical significance can be obtained through the three aforementioned channels.