Speaker
Description
Heavy neutrinos provide one of the most compelling windows into physics beyond the Standard Model, offering a common framework for neutrino mass generation, the matter-antimatter asymmetry of the Universe, and potentially dark matter. Their rich phenomenology spans collider, intensity-frontier, and cosmological experiments, making them ideal targets for a multimessenger search strategy.
In this talk, I will present recent advances in heavy-neutrino searches across complementary experimental frontiers. I will discuss direct probes at the LHC, LHeC, FCC-ee, FCC-hh, and future muon colliders through prompt, displaced-vertex, and long-lived particle signatures, with emphasis on novel tests of the Majorana nature of neutrinos via lepton-number violation, heavy-neutrino oscillations, and high-multiplicity final states. I will also highlight the potential of forward and beam-dump experiments to probe light, feebly interacting heavy neutrinos and the role of additional gauge interactions. Together, these complementary approaches provide a comprehensive roadmap for exploring the heavy-neutrino parameter space and uncovering the origin of neutrino masses.