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Flux limits on ultra high energy neutrinos with AMANDA-B10 |
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| Institution: | aDESY, 15735 Zeuthen, Germany bInstitute of Physics, University of Mainz, D-55099 Mainz, Germany cDepartment of Physics, Pennsylvania State University, University Park, PA 16802, USA dBartol Research Institute, University of Delaware, Newark, DE 19716, USA eDepartment of Physics, University of California, Berkeley, CA 94720, USA fDepartment of Physics, Bergische Univerität Wuppertal, 42097 Wuppertal, Germany gDepartment of Physics and Astronomy, University of California, Irvine, CA 92697, USA hUniversité Libre de Bruxelles, Science Faculty CP230, Boulevard du Triomphe, B-1050 Brussels, Belgium iDivision of High Energy Physics, Uppsala University, S-75121 Uppsala, Sweden jDepartment of Physics, University of Wisconsin, Madison, WI 53706, USA kDepartment of Physics, Stockholm University, SE-10691 Stockholm, Sweden lUniversity of Mons-Hainaut, 7000 Mons, Belgium mVrije Universiteit Brussel, Dienst ELEM, B-1050 Brussels, Belgium nDepartment of Physics, University of Maryland, College Park, MD 20742, USA oLawrence Berkeley National Laboratory, Berkeley, CA 94720, USA pPhysics Department, University of Wisconsin, River Falls, WI 54022, USA qDepartment of Chemistry and Biomedical Sciences, University of Kalmar, S-39182 Kalmar, Sweden rDepartment of Physics, Universidad Simón Bolívar, Caracas, 1080, Venezuela |
| Abstract: | Data taken during 1997 with the AMANDA-B10 detector are searched for a diffuse flux of neutrinos of all flavors with energies above 1016 eV. At these energies the Earth is opaque to neutrinos, and thus neutrino induced events are concentrated at the horizon. The background are large muon bundles from down-going atmospheric air shower events. No excess events above the background expectation are observed and a neutrino flux following E?2, with an equal mix of all flavors, is limited to E2Φ(1015 eV < E < 3 × 1018 eV)  0.99 × 10?6 GeV cm?2 s?1 sr?1 at 90% confidence level. This is the most restrictive experimental bound placed by any neutrino detector at these energies. Bounds to specific extraterrestrial neutrino flux predictions are also presented. |
| Keywords: | Neutrino telescopes Neutrino astronomy UHE neutrinos AMANDA |
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