Results from the Anita Experiment

Details Results from the Anita Experiment Results from the Anita Experiment

Nov 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007auhe.conf..213s&link_type=abstract

ASTROPHYSICS AT ULTRA-HIGH ENERGIES. Proceedings of the 15th Course of the International School of Cosmic Ray Astrophysics . Hel

Astronomy and Astrophysics

Astronomy

High Energy Neutrinos, Neutrino Astronomy, Antarctic Ice Attenuation, Gzk Neutrinos, Radio Detection, Anita, Arianna

Scientific paper

The ANtarctic Impulse Transient Antenna (ANITA) is the first long-duration balloon experiment designed to search and measure the flux of Greisen-Zapsepin-Kuzmin (GZK) neutrinos. We present new limits on neutrinos fluxes of astronomical origin from data collected with the successful launch of a 2-antenna prototype instrument, called ANITA-lite, that circled the Antarctic continent for 18.4 days in January 2004. We performed a search for Ultra-High-Energy (UHE) neutrinos with energies above 3 × 1018 eV. No excess events above the background expectation were observed and a neutrino flux following E-2 spectrum for all neutrino flavors, is limited to E-2ν F < 1.6× 10-6 GeV cm-2 s-1 sr-1 for 1018.5 eV < Eν < 1023.5 eV at 90% confidence level. The launch of ANITA is scheduled for December 2006. Looking beyond ANITA, we describe a new idea, called ARIANNA (Antarctic Ross Iceshelf ANtenna Neutrino Array), to increase the sensitivity for GZK neutrinos by one order of magnitude better than ANITA.

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