Motivated by a $\sim 3\sigma$ excess recorded by the CMS experiment at the LHC around a mass of order $\sim 137\mathrm{GeV}$ in $ZZ\to 4l$ and $\gamma \gamma$ samples, we analyze the discovery potential of a second neutral Higgs boson in the Supersymmetric $B-L$ extension of the Standard Model at the CERN machine. We confirm that a double Higgs peak structure can be generated in this framework, with $CP$-even Higgs boson masses at $\sim 125\mathrm{GeV}$ and $\sim 137\mathrm{GeV}$, unlike the case of the Minimal Supersymmetric Standard Model.

• Received 17 October 2014

DOI:https://doi.org/10.1103/PhysRevD.91.014001