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We study the pair production of fourth generation neutrinos from the decay ofan on-shell Higgs produced by gluon fusion. In a fourth generation scenario,the Higgs branching fraction into fourth generation neutrinos may be quitelarge. In the case that the unstable heavy neutrinos are a mixed Majorana andDirac state, neutrinos pair-produced from Higgs decay will yield a substantialnumber of like-sign dilepton events. In this article we use inclusive like-signdilepton searches from hadron colliders to constrain the theoretical parameterspace of fourth generation leptons.

Higgs Decays to Unstable Neutrinos: Collider Constraints from Inclusive Like-Sign Dilepton Searches