Neutrino flavor oscillation experiments have firmly established that neutrinos do have non-zero masses. This is a contradiction to the minimal Standard Model (SM) of Particle Physics. While being insensitive to the absolute neutrino mass scale, flavor oscillation experiments provide lower mass limits, depending on the neutrino mass ordering. Direct neutrino mass measurements establish upper...
With the discovery of the 3rd neutrino mixing angle, theta13, in 2012 a door was opened to answer the remaining unknowns in neutrino oscillations: the mass hierarchy, whether theta23 is larger/smaller or exactly 45 degrees, and whether CP symmetry is violated. Several experiments have exciting new data and are exploring this landscape. I will review the current results and consider the...
The Borexino liquid scintillator neutrino observatory is devoted to perform high- precision neutrino observations, and it is optimized for measurements in the low energy (sub- MeV) region of the neutrino spectrum. The direct measurements, already accomplished, of the interaction rates from pp, 7Be, pep, 8B neutrinos put Borexino in the unique situation of being the only experiment able to...
I review the experimental indications in favor of short-baseline neutrino oscillations
and I discuss their interpretation in the framework of 3+1 neutrino mixing with a
sterile neutrino at the eV scale. I show that the recent results of the NEOS and DANSS
reactor neutrino experiments give a new model-independent indication in favor of
short-baseline electron antineutrino disappearance,...
The observation of neutrinoless double beta decay would unambiguosly demonstrate that neutrinos are Majorana particles and would provide unique information about the ordering and absolute scale of neutrino masses. This very rare decay is actively searched for in a number of candidate isotopes. It violates lepton-number and is predicted by many extensions of the standard model. The most recent...
High-energy neutrinos are an important messenger particle to understand the high-energy universe. In 2013, the IceCube Neutrino Observatory has reported the first observation of a flux of high-energy astrophysical neutrinos with energies reaching above PeV. However, the sources of these neutrinos remain a puzzle. Since then, these measurements have been refined and the observation has been...
The field of reactor neutrino physics has accumulated a series of anomalies over the years, the most recent of which occurs with reactor antineutrinos. The appearance of such an anomaly relies on an exquisite knowledge of both beta spectrum shapes and isotopic abundance inside the reactor medium. In an attempt to mitigate the uncertainties of the latter, a conversion method is typically used...
The current status of our knowledge of the
3-neutrino mixing parameters and of
the CP violation in the lepton sector is summarised.
The non-Abelian discrete symmetry approach to understanding the
observed pattern of neutrino mixing and the related predictions
for neutrino mixing angles and leptonic Dirac CP violation
are reviewed.
In the recent years neutrino physics achieved very important goals like the discovery of neutrino oscillations, proving that neutrino have mass.
These discoveries open the door to even more ambitious searches like the hunt for CP violation in neutrino oscillations, the quest for the absolute neutrino mass and the ordering of the three neutrino masses, the question if neutrinos are their own...
