Looking for supersymmetric partners of Higgs bosons with the CMS experiment at the CERN LHC

The criterion of naturalness for the Higgs potential suggests that there may be new laws of physics to be discovered at the TeV scale, the scale probed by the large hadron collider (LHC). One class of natural theories that could appear at the TeV scale is supersymmetry, which can also explain dark matter as well as gauge coupling unification. This talk covers a search for higgsinos, supersymmetric partners of Higgs bosons, with the compact muon solenoid (CMS) experiment. This search targets the final state with two Higgs bosons and missing transverse momentum, and its results are interpreted in simplified models of supersymmetry. Furthermore, it is planned that CMS will collect a much larger dataset provided by the high-luminosity LHC (HL-LHC), which will allow a thorough search program for new physics at the TeV scale. To cope with the high rates of particles at the HL-LHC, much of the CMS detector will need to be upgraded. This talk also discusses the upgrade of the CMS endcap muon system electronics.