Search for a diffuse flux of high-energy ¿µ with the ANTARES neutrino telescope
2010
A search for a diffuse flux of astrophysical muon neutrinos, using data collected by the ANTARES neutrino
telescope is presented. A (0.83 × 2π) 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 νμ flux
of E2Φ90% = 5.3 × 10−8 GeVcm−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.
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