Search for a Diffuse Flux of Cosmic Neutrinos with ANTARES

The ANTARES neutrino telescope, situated off the French coast at about 2.5 km depth in the Mediterranean Sea, is optimized to detect charged leptons induced by neutrinos in the TeV range. Since its full deployment in 2008, modelling and reconstruction of neutrino-induced event signatures have been introduced and developed to obtain a high degree of accuracy. In this work, muon track directional and energy reconstruction have been applied to four years of ANTARES data in the search for a diffuse flux of astrophysical neutrinos from the charged-current interactions of νμ. Reaching a sensitivity which well surpasses the sensitivity of previous ANTARES analyses, a best upper limit of Φν+ν,90%C.L.E2 = 5.1 × 10−8 GeV sr−1 s−1 cm−2 can be set.