Speaker
Description
Neutrinos can be a key to solving several cosmological problems, such as the mystery of the baryon-antibaryon asymmetry in the universe or the origin of dark matter. The existence of their heavier partners, the so-called heavy neutral leptons (HNL), is a well-motivated scenario which could also contribute to explaining the mass-generation mechanism for light neutrinos. Future lepton colliders, including e+e- linear machines, will offer the farthest discovery reach for these particles and allow for studying their features, probing the lepton-flavour universality and constraining their Dirac or Majorana nature. In this talk, we will show how to look for HNL with masses above the Z-pole at future lepton colliders and answer the fundamental questions concerning their properties.
