[NU145] Ultra-high energy neutrinos: status and perspectives
Despite decades of observation, the nature and origin of ultra-high energy cosmic rays (UHECR), with energies in the EeV range and above, remains unknown. The mere existence of UHECR implies that UHE neutrinos should also be produced, but at a level that remains uncertain due to the relatively poor knowledge on the sources of UHECR. In the last few years, the IceCube and Pierre Auger observatories have started to constrain potential sources of UHECR through the non-observation of the so-called cosmogenic neutrinos expected to be produced in interactions of UHECR with the Cosmic Microwave Background. The low predicted fluxes in many cosmogenic neutrino models motivate the need for a boost in sensitivity, intended to be achieved with next-generation detectors exploiting the radio technique in dense and dielectric media. Also, existing experiments are planning to improve their performance by building larger and/or more precise detectors. A summary of all these developments will be reported.