Limits on the Ultra-High Energy Electron Neutrino Flux from the RICE Experiment

Abstract

Upper limits are presented on the diffuse flux of ultra-high energy ${\nu }_e$, based on analysis of data taken by the RICE experiment during August, 2000. The RICE receiver array at South Pole monitors cold ice for radio-wavelength Cherenkov radiation resulting from neutrino-induced in-ice showers. For energies above 1 EeV, RICE is an effective detector of over 15 km${}^3$ sr. Potential signal events are separated from backgrounds using vertex location, event reconstruction, and signal shape. These are the first terrestrial limits exploiting the physics of radio Cherenkov emissions from charged-current ${\nu }_e+N\to e+N^{\prime }$ interactions.

29 pages, 10 Figures (Latex2e), Revised version submitted to Astroparticle Physics. Revisions include: Extended discussion of systematic uncertainties. Extended discussion of event rates due to "hadronic channels". Revised limits due to changes in monte carlo simulation

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