Study of atmospheric neutrino oscillations with the ANTARES neutrino telescope

Abstract : Neutrinos are probably the most peculiar particles known. From the first as sumption about their existence, back in 1930, till today, they have challenged scientists in building innovative experimental techniques as well as in developing theoretical models in order to explain and study their properties. The ANTARES neutrino telescope has been optimized to study high energy neutrinos coming from galactic and extra-galactic astrophysical objects. On the other hand, at neutrino energies of the order of a few tens of GeV, the detector configuration and the reconstruction algorithms allow to study the phenomenon of atmospheric muon neutrino disappearance due to neutrino oscillations, by looking at distortions in the energy and angular distributions of detected events. In a similar way, constraints on the 3+1 neutrino model, which foresees the existence of a sterile neutrino, can be inferred. Using data collected by the ANTARES neutrino telescope from 2007 to 2016, a new measurement of ∆m2 32 and θ23 has been performed, and constraints on the 3+1 model have been derived. Cherenkov light induced byradio active decay products is one of the major sources of background light for deep-sea neutrino telescopes such as ANTARES. These decays are at the same time a powerful calibration source. Using data collected by the ANTARES neutrino telescope from mid 2008 to 2017, the time evolution of the photon detection efficiency of optical modules has been studied as well
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Illénia Salvadori. Study of atmospheric neutrino oscillations with the ANTARES neutrino telescope. Physique des Hautes Energies - Expérience [hep-ex]. Aix Marseille Université, 2018. Français. ⟨tel-02265258⟩

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