Neutrinos: from surprising past results, to current unexplained anomalies and questions for the future

Abstract
In the past twenty years, the discovery of neutrino oscillations has changed our understanding of neutrinos and proved that the Standard Model of particle physics is incomplete. We now know that neutrinos have mass and mix. An impressive progress has been made, thanks to a broad experimental programme, and most of their properties have been determined with precision. In this colloquium, I will briefly review the current knowledge of neutrino properties, highlighting the still open questions, with emphasis on the nature of neutrinos, their masses and leptonic CP violation. I will then discuss the hints for a richer structure beyond three-neutrino mixing, which have been interpreted in terms of sterile neutrinos and/or new neutrino interactions. I will review the experimental status and the expected near future developments and their possible theoretical implications.
BIO
Silvia Pascoli is Professor at the University of Bologna since 2020. After receiving her PhD from SISSA (Trieste) in 2002, she got a postdoctoral position at UCLA and then joined CERN as Fellow. In 2005 she obtained a faculty position at Durham University. Her research activity spans a broad range of topics in neutrino phenomenology, flavour model building, and astroparticle physics. Her main focus is on the physics reach of future neutrino experiments, the origin of neutrino masses, the explanation of the baryon asymmetry via leptogenesis, and links between neutrinos and dark matter.