Radio EVLA search for UHE neutrinos: Project RESUN

摘要

The RESUN experiment used the very large array to search for cm-wavelength Cherenkov bursts from UHE neutrinos impacting the Moon. No pulses of lunar origin were detected during an observing campaign totaling 200 h. The RESUN null-detection implies an upper limit to the differential isotropic neutrino flux EdN/dE<1 km~(-2) yr~(-1) sr~(-1) at 90% confidence level for sources with energy (E) exceeding 10~(21.2)eV and EdN/dE < 0.1 km~(-2) yr~(-1) sr~(-1) for E>10~(22.5)eV. The isotropic flux upper limit is the lowest published for lunar searches and is inconsistent with extragalactic and halo Z burst models for neutrino generation.