Supersymmetry discovery potential at HL-LHC and HE-LHC

The discovery of the Higgs boson at ∼125 GeV indicates that the size of weak scale supersymmetry is higher than what was perceived in the pre-Higgs boson discovery era and lies in the several TeV region. This makes the discovery of supersymmetry more challenging and argues for hadron colliders beyond LHC at 14 TeV. A possibility recently proposed is the high energy LHC (HE-LHC) with significantly higher luminosity than at the HL-LHC. In this work we investigate the potential of HE-LHC for the discovery of supersymmetry in three categories of particle production: gluinos, electroweakinos and heavy charged Higgs. We study a class of supergravity unified models under the Higgs boson mass and the dark matter relic density constraints and compare the analysis with the potential reach of the HL-LHC. A set of benchmarks is presented which are beyond the discovery potential of HL-LHC but are discoverable at HE-LHC. For comparison, we study model points at HE-LHC which are also discoverable at HL-LHC. For these model points, it is shown [PRD 98, 015009 (2018) and PRD 98, 095024 (2018)] that the runtime required for discovery is greatly reduced at HE-LHC in comparison to HL-LHC indicating that the HE-LHC possibility should be seriously pursued.