The discovery of neutrinoless β β decay could soon be within reach. This hypothetical
ultrarare nuclear decay offers a privileged portal to physics beyond the standard model of …

Particle physics today faces the challenge of explaining the mystery of dark matter, the origin
of matter over anti-matter in the Universe, the origin of the neutrino masses, the apparent …

Since the discovery of neutrino oscillations, we know that neutrinos have non-zero mass.
However, the absolute neutrino-mass scale remains unknown. Here we report the upper …

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 …

This report provides an extensive review of the experimental programme of direct detection
searches of particle dark matter. It focuses mostly on European efforts, both current and …

Advances in machine learning methods provide tools that have broad applicability in
scientific research. These techniques are being applied across the diversity of nuclear …

We report results from searches for new physics with low-energy electronic recoil data
recorded with the XENON1T detector. With an exposure of 0.65 tonne-years and an …

In the current 3 ν paradigm, neutrino flavor oscillations probe three mixing angles (θ 12, θ
23, θ 13), one CP-violating phase δ, and two independent differences between the squared …

The KamLAND-Zen experiment has provided stringent constraints on the neutrinoless
double-beta (0 ν β β) decay half-life in Xe 136 using a xenon-loaded liquid scintillator. We …

The possibility that neutrinos may be their own antiparticles, unique among the known
fundamental particles, arises from the symmetric theory of fermions proposed by Ettore …