Searching for the Minimal Seesaw Models at the LHC and Beyond

Figure 25

Bounds on the square of the mixing angle from the same-sign dilepton plus di-jet final state as a function of the heavy neutrino mass . The shaded region is ruled out by DELPHI, EWPD, and Higgs data. Prospective bounds from the Higgs data had been calculated in [45] for the LHC at the high luminosity  fb⁻¹) and future  TeV pp collider.