Rare meson decays are among the most sensitive probes of both heavy and light new
physics. Among them, new physics searches using kaons benefit from their small total decay …

At the dawn of a new decade, particle physics faces the challenge of explaining the mystery
of dark matter, the origin of matter over antimatter in the Universe, the apparent fine-tuning of …

The existence of nonzero neutrino masses points to the likely existence of multiple Standard
Model neutral fermions. When such states are heavy enough that they cannot be produced …

The preponderance of matter over antimatter in the early universe, the dynamics of the
supernovae that produced the heavy elements necessary for life, and whether protons …

Abstract The Physics Beyond Colliders initiative is an exploratory study aimed at exploiting
the full scientific potential of the CERN's accelerator complex and scientific infrastructures …

Abstract The Deep Underground Neutrino Experiment (DUNE) will be a powerful tool for a
variety of physics topics. The high-intensity proton beams provide a large neutrino flux …

This paper describes the physics case for a new fixed target facility at CERN SPS. The SHiP
(search for hidden particles) experiment is intended to hunt for new physics in the largely …

We review the collider phenomenology of neutrino physics and the synergetic aspects at
energy, intensity and cosmic frontiers to test the new physics behind the neutrino mass …

Neutrinos, being the only fermions in the Standard Model of Particle Physics that do not
possess electromagnetic or color charges, have the unique opportunity to communicate with …

The NA62 experiment at CERN reports searches for K+→ μ+ N and K+→ μ+ ν X decays,
where N and X are massive invisible particles, using the 2016–2018 data set. The N particle …