Abstract
In 2018, the IceCube collaboration reported evidence for the identification of a blazar as an astrophysical neutrino source. That evidence is briefly summarised here before focusing on the prospects of tau neutrino physics in IceCube, both at high energies (astrophysical neutrinos) and at lower energies (atmospheric neutrino oscillations). In addition, future neutrino detectors such as KM3NeT and the IceCube Upgrade and their tau neutrino physics potential are discussed. Finally, the detection mechanism for high-energy (tau) neutrinos in the Pierre Auger Observatory and the resulting flux upper limits are presented.
Highlights
IntroductionThe discovery of an astrophysical neutrino flux in 2013 by the IceCube collaboration marked the birth of neutrino astronomy
In 2018, the IceCube collaboration reported evidence for the identification of a blazar as an astrophysical neutrino source
KM3NeT will be constructed at two separate geographical locations: a densely instrumented detector called KM3NeT ORCA will be built off the French coast and will study lowenergy atmospheric neutrino oscillations, while a more sparsely instrumented detector called KM3NeT ARCA will be built off the Italian coast near Sicily for the study of high-energy astrophysical neutrinos
Summary
The discovery of an astrophysical neutrino flux in 2013 by the IceCube collaboration marked the birth of neutrino astronomy. Both the ANTARES and IceCube collaborations have been searching for the sources of these astrophysical neutrinos This endeavour paid off in 2018, when IceCube gathered evidence for a known blazar as an astrophysical neutrino source. This result was obtained in close collaboration with other astronomical observatories, which shows both the maturity and the power of the multi-messenger approach to astronomy. In addition to these breakthrough discoveries, IceCube currently has a rich tau neutrino physics program.
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