Search for a diffuse flux of high-energy nu(mu) with the ANTARES neutrino telescope

Abstract
A search for a diffuse flux of astrophysical muon neutrinos, using data collected by the ANTARES neutrino telescope is presented. A (0.83 x 2 pi) sr sky was monitored for a total of 334 days of equivalent live time. The searched signal corresponds to an excess of events, produced by astrophysical sources, over the expected atmospheric neutrino background. The observed number of events is found compatible with the background expectation. Assuming an E-2 flux spectrum, a 90% c.l. upper limit on the diffuse nu(mu) flux of E-2 Phi(90%) = 5.3 x 10(-8) GeV cm(-2) s(-1) sr(-1) in the energy range 20 TeV-2.5 PeV is obtained. Other signal models with different energy spectra are also tested and some rejected.
Description
Bibliographic reference
ANTARES Collaboration Aguilar Sánchez, Juan Antonio Bigongiari, C. Dornic, Damien Emanuele, U. Gómez González, Juan Pablo Hernández Rey, Juan José Mangano, Salvatore Salesa Greus, Francisco Toscano, S. Yepes Ramírez, Harold Zornoza Gómez, Juan de Dios Zúñiga Román, Juan 2011 Search for a diffuse flux of high-energy nu(mu) with the ANTARES neutrino telescope Physics Letters B 696 1-2 16 22
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