Heavy neutrino searches at ATLAS and CMS

Multiple theories beyond the Standard Model predict the existence of heavy neutrinos in order to explain the light neutrino masses, such as the Type I seesaw mechanism, which introduces new heavy neutrino states without additional vector bosons, or the Type III seesaw mechanism which introduces additional heavy lepton triplets. Left-right symmetric models, which restore parity symmetry in weak interactions at a higher energy scale, also predict heavy neutrinos, along with right-handed counterparts to the weak gauge bosons. Searches for such heavy Majorana or Dirac neutrinos with the ATLAS and CMS detectors will be presented using proton-proton data from the LHC at a center-of-mass energy of 13 TeV.