New bounds on light sneutrino masses: Rare SUSY signals

We study bounds on a neutral component of a weak doublet scalar lepton. A typical example of such a particle is sneutrinos in supersymmetric models. Using constraints from invisible Higgs decays, we place a lower bound of approximately mh/2. We recast a mono-W/Z search with a hadronic vector-boson tag in order to bound parameter space in the sneutrino–charged slepton mass plane. We find a lower bound on sneutrinos in the range of 55–100 GeV in the 36 fb−1 data set depending on the mass of the charged component. We propose a sensitivity search in the hadronic mono-W / Z channel for HL-LHC and discuss both the discovery potential in case an excess is seen and the exclusion limit assuming no excess is seen.