Horizon 1 1 17 ACL : Articles dans des revues avec comité de lecture répertoriées par l'AERES Physics Letters B 16-22 Neutrino telescope Diffuse muon neutrino flux ANTARES 2011 fdi:010053147 ENG Physics Letters B 0370-2693 ISI:000286708900004 1-2 10.1016/j.physletb.2010.11.070 https://www.documentation.ird.fr/hor/fdi:010053147 https://www.documentation.ird.fr/intranet/publi/2011/03/010053147.pdf 696 Horizon (IRD) 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. 060 ; 020 UR082