The Giant Radio Array for Neutrino Detection

Ultra-high energy (UHE) neutrinos are arguably the most promising way to find the origin of the most energetic particles in the universe. The Giant Radio Array for Neutrino Detection (GRAND) is a proposed detector designed to discover and study the sources of UHE cosmic rays by looking for UHE neutrinos. GRAND will also observe UHE cosmic rays, and gamma rays that are co-produced with the neutrinos, allowing for multi-messenger studies at the highest energies. The science goals for GRAND also include studying fundamental neutrino physics, astrophysical radio transients, and the cosmic epoch of reionization. GRAND will be a network of 20 subarrays of 10,000 radio antennas each, deployed in radio-quiet sites around the world, totaling a combined area of 200,000 km². We present the scientific motivation, detection strategy, design, and construction plans for GRAND.