Download or read book The Search for Ultra-high Energy Neutrinos with AMANDA-II written by Lisa Marie Gerhardt and published by . This book was released on 2007 with total page 216 pages. Available in PDF, EPUB and Kindle. Book excerpt: A search for non-localized neutrinos with energies in excess of 10 5 GeV was conducted with 456.8 days of AMANDA-II data recorded between 2000 and 2002. Above 107 GeV the Earth is essentially opaque to neutrinos. This, combined with the limited overburden above the AMANDA-II detector (roughly 1.5 km), concentrates these ultra-high energy neutrinos at the horizon. The primary background for this analysis is bundles of downgoing, high-energy muons from the decay of cosmic rays in the atmosphere. Since no statistically significant excess above the expected background was seen in the data, an upper limit on the flux of E2phi90%CL