Phys. Rev. Lett. 93, 041101 (2004) [4 pages]

Experimental Limit on the Cosmic Diffuse Ultrahigh Energy Neutrino Flux

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P. W. Gorham^1,2, C. L. Hebert¹, K. M. Liewer², C. J. Naudet², D. Saltzberg³, and D. Williams³
¹Department of Physics & Astronomy, University of Hawaii at Manoa, 2505 Correa Road, Honolulu, Hawaii 96822, USA
²Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California 91109, USA
³Department of Physics & Astronomy, University of California at Los Angeles, Los Angeles, California 90024, USA

Received 15 October 2003; published 20 July 2004

We report results from 120 h of live time with the Goldstone lunar ultrahigh 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 22 km and linked by optical fiber. Such pulses would arise from subsurface electromagnetic cascades induced by interactions of ≥100 EeV (1 EeV=10¹⁸ eV neutrinos in the lunar regolith. No candidates are yet seen, and the implied limits constrain several current models for ultrahigh energy neutrino fluxes.

URL:

http://link.aps.org/doi/10.1103/PhysRevLett.93.041101

DOI:

10.1103/PhysRevLett.93.041101

PACS:

98.70.Sa, 95.55.Vj, 96.40.Tv

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Phys. Rev. Lett. 93, 041101 (2004) [4 pages]

Experimental Limit on the Cosmic Diffuse Ultrahigh Energy Neutrino Flux