New limits on a diffuse flux of >=100 EeV cosmic neutrinos

Details New limits on a diffuse flux of >=100 EeV cosmic neutrinos New limits on a diffuse flux of >=100 EeV cosmic neutrinos

Jul 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001aipc..579..177g&link_type=abstract

First international workshop on the radio detection of high energy particles. AIP Conference Proceedings, Volume 579, pp. 177-1

Physics

4

Cosmic Rays

Scientific paper

We report on results from about 30 hours of livetime with the Goldstone Lunar Ultra-high energy neutrino Experiment (GLUE). The experiment searches for ~10 ns microwave pulses from the lunar regolith, appearing in coincidence at two large radio telescopes separated by about 20 km and linked by optical fiber. The pulses can arise from subsurface electromagnetic cascades induced by interactions of up-coming ~100 EeV neutrinos in the lunar regolith. A new triggering method implemented after the first 12 hours of livetime has significantly reduced the terrestrial interference background, and we now operate at the thermal noise level. No strong candidates are yet seen. We report on limits implied by this non-detection, based on new Monte Carlo estimates of the efficiency. We also report on preliminary analysis of smaller pulses, where some indications of non-statistical excess may be present. .

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