New Limits on the Ultra-High Energy Cosmic Neutrino Flux from the ANITA Experiment

We report initial results of the first flight of the Antarctic Impulsive Transient Antenna (ANITA-1) 2006-2007 Long Duration Balloon flight, which searched for evidence of a diffuse flux of cosmic neutrinos above energies of E{sub v} = 3 x 10{sup 18} eV. ANITA-1 flew for 35 days looking for radio im...

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Bibliographic Details
Main Authors: Gorham, P.W., Allison, P., Barwick, S.W., Beatty, J.J., Besson, D.Z., Binns, W.R., Chen, C., Chen, P., Clem, J.M., Connolly, A., Dowkontt, P.F., DuVernois, M.A., Field, R.C., Goldstein, D., Goodhue, A., Hast, C., Hebert, C.L., Hoover, S., Israel, M.H., Kowalski, J., Learned, J.G.
Language:unknown
Published: 2012
Subjects:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ANTENNAS
COSMIC NEUTRINOS
EXTENSIVE AIR SHOWERS
NEUTRINOS
PHYSICS
TRANSIENTS
Antarctic
The Antarctic
Antarc*
Online Access:http://www.osti.gov/servlets/purl/1030510
https://www.osti.gov/biblio/1030510
Description
Summary:We report initial results of the first flight of the Antarctic Impulsive Transient Antenna (ANITA-1) 2006-2007 Long Duration Balloon flight, which searched for evidence of a diffuse flux of cosmic neutrinos above energies of E{sub v} = 3 x 10{sup 18} eV. ANITA-1 flew for 35 days looking for radio impulses due to the Askaryan effect in neutrino-induced electromagnetic showers within the Antarctic ice sheets. We report here on our initial analysis, which was performed as a blind search of the data. No neutrino candidates are seen, with no detected physics background. We set model-independent limits based on this result. Upper limits derived from our analysis rule out the highest cosmogenic neutrino models. In a background horizontal-polarization channel, we also detect six events consistent with radio impulses from ultrahigh energy extensive air showers.

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