Abstract Particles beyond the Standard Model (SM) can generically have lifetimes that are
long compared to SM particles at the weak scale. When produced at experiments such as …

A bstract The problems of neutrino masses, matter-antimatter asymmetry, and dark matter
could be successfully addressed by postulating right-handed neutrinos with Majorana …

A bstract The future high-energy muon colliders, featuring both high energy and low
background, could play a critical role in our searches for new physics. The smallness of …

A bstract Heavy Neutral Leptons (HNLs) are hypothetical particles predicted by many
extensions of the Standard Model. These particles can, among other things, explain the …

The Deep Underground Neutrino Experiment (DUNE) is an international, world-class
experiment aimed at exploring fundamental questions about the universe that are at the …

A bstract We study the prospects of a displaced-vertex search of sterile neutrinos at the
Large Hadron Collider (LHC) in the framework of the neutrino-extended Standard Model …

A bstract Heavy nearly-sterile neutrinos are a common ingredient in extensions of the
Standard Model which aim to explain neutrino masses, like for instance in Type I seesaw …

A bstract We study the sensitivity of displaced vertex searches for heavy neutrinos produced
in W boson decays in the LHC detectors ATLAS, CMS and LHCb. We also propose a new …

A bstract Traditional direct searches for dark matter, looking for nuclear recoils in deep
underground detectors, are challenged by an almost complete loss of sensitivity for light …

A bstract The exploration of long-lived particles in the MeV-GeV region is a formidable task
but it may provide us a unique access to dark sectors. Fixed-target facilities with sufficiently …