Search for a Diffuse Flux of Muon Neutrinos with the ANTARES Telescope

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Aithousa Mitropoulos ()

Aithousa Mitropoulos

Megaron, Athens - Greece


Dr Simone Biagi (INFN - Bologna)


The ANTARES high-energy neutrino telescope is a three-dimensional array of photomultipliers distributed over 12 lines installed in the Mediterranean Sea. The detector has been operated in partial configurations since March 2006 and was completed in May 2008. The main goal of the experiment is the search for high-energy neutrinos from astrophysical sources. A neutrino telescope in the Northern hemisphere includes the Galactic Centre in its field of view and is complementary to the IceCube Antarctic telescope. The detector is optimized for the detection of muon neutrinos, since at energies above 1 TeV muons resulting from charged current interactions can travel kilometers and are almost collinear with the parent neutrinos. In this analysis, the search for very-high energy (E>100 TeV) extraterrestrial muon neutrinos from unresolved sources is presented. If the sensitivity of point source search techniques is too small to detect neutrino fluxes from individual sources, it is possible that many sources could produce an excess of events over the expected atmospheric neutrino background. The sensitivity of the ANTARES detector to diffuse neutrinos is evaluated from MonteCarlo simulations using the Model Rejection Potential technique. The different detector configurations from Dec. 2007 to Dec. 2009 are considered when analyzing data, with an equivalent livetime of 330 days. The results are presented and the upper limit for diffuse flux neutrinos is shown.

Primary author

Dr Simone Biagi (INFN - Bologna)

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