Speaker
Description
Precise detection of cosmogenic ultra-high-energy (UHE) neutrinos, with energy in excess of 108 GeV, will confirm the photo-dissociation of UHE cosmic rays and the identification of the sources of UHE neutrinos will directly point to sources of UHE cosmic rays.
GRAND will look for ντs interacting in rock, thereby creating an UHE τ lepton, which can escape from the rock.The τ decay products will create an air shower that can be detected.
As the flux of these UHE neutrinos is expected to be low, GRAND requires a huge exposure, which is only possible with a cheap and reliable detection method. Our air shower detection is based on the recently proven radio technology. In several steps of development we expect to be able to instrument up to 200,000 km2 for about 150 M euro.
Except for a guaranteed detection of UHE neutrinos, GRAND will be able to investigate many other science topics, including neutrino physics, UHE gamma-ray detection, UHE cosmic ray astronomy and physics with very large statistics, the detection of fast radio bursts and giant radio pulses, and a measurement of the epoch of reionisation.
The R&D and different initial phases of development of GRAND, as well as the physics reach for these research topics will be discussed.
