%A ANITA collaboration %A SW Barwick %A JJ Beatty %A DZ Besson %A WR Binns %A B Cai %A JM Clem %A A Connolly %A DF Cowen %A PF Dowkontt %A MA DuVernois %A PA Evenson %A D Goldstein %A PW Gorham %A CL Hebert %A MH Israel %A JG Learned %A KM Liewer %A JT Link %A S Matsuno %A P Miocinovic %A J Nam %A CJ Naudet %A R Nichol %A K Palladino %A M Rosen %A D Saltzberg %A D Seckel %A A Silvestri %A BT Stokes %A GS Varner %A F Wu %T Constraints on Cosmic Neutrino Fluxes from the ANITA Experiment %L discovery182608 %N 17 %V 96 %J Phys.Rev.Lett. %D 2006 %O © 2006 The American Physical Society %X We report new limits on cosmic neutrino fluxes from the test flight of the Antarctic Impulsive Transient Antenna (ANITA) experiment, which completed an 18.4 day flight of a prototype long-duration balloon payload, called ANITA-lite, in early 2004. We search for impulsive events that could be associated with ultra-high energy neutrino interactions in the ice, and derive limits that constrain several models for ultra-high energy neutrino fluxes. We rule out the long-standing Z-burst model as the source for the ultra-high energy cosmic rays.