Searches for Ultra-High Energy Neutrinos at the Pierre Auger Observatory

J. ALVAREZ-MUÑIZ; THE PIERRE AUGER COLLABORATION.; S. J. SCIUTTO

Boston

Conferencia; Neutrino 2014; 2014

Neutrinos in the sub-EeV energy range and above can be detected and identified with the Surface Detector arrayof the Pierre Auger Observatory. The identification can be efficiently done for neutrinos of all flavours interacting in theatmosphere, typically above 60 (downward-going), as well as for ?Earth-skimming" neutrino interactions in the case of tauneutrinos (upward-going). Three sets of identification criteria were designed to search for downward-going neutrinos in thezenith angle bins 60 􀀀 75 and 75 􀀀 90 as well as for upward-going neutrinos. The three searches have been recentlycombined, providing, in the absence of candidates in data from 1 January 04 until 31 December 12, a stringent limit to thediffuse flux of ultra-high energy neutrinos.