Searching for tau neutrinos with Cherenkov telescopes |
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Affiliation: | 1. IRFU, CEA, Université Paris-Saclay, Gif-sur-Yvette F-91191, France;2. Laboratoire d’Annecy de Physique des Particules, Université de Savoie, CNRS/IN2P3, Annecy F-74941, France;3. Laboratoire Leprince-Ringuet, Ecole Polytechnique, CNRS/IN2P3, Palaiseau F-91128, France;4. Institut für Astro- und Teilchenphysik, Leopold-Franzens-Universität Innsbruck, Innsbruck A-6020, Austria;1. Department of Anesthesiology, Perioperative Medicine and;2. Zhejiang Province Key Lab of Anesthesiology, The Second Affiliated Hospital and Yuying Children''s Hospital of Wenzhou Medical University, Wenzhou, China;3. Eye Hospital of Wenzhou Medical University, Wenzhou Medical University, Wenzhou, China |
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Abstract: | Cherenkov telescopes have the capability of detecting high energy tau neutrinos in the energy range of 1–1000 PeV by searching for very inclined showers. If a tau lepton, produced by a tau neutrino, escapes from the Earth or a mountain, it will decay and initiate a shower in the air which can be detected by an air shower fluorescence or Cherenkov telescope. In this paper, we present detailed Monte Carlo simulations of corresponding event rates for the VERITAS and two proposed Cherenkov Telescope Array sites: Meteor Crater and Yavapai Ranch, which use representative AGN neutrino flux models and take into account topographic conditions of the detector sites. The calculated neutrino sensitivities depend on the observation time and the shape of the energy spectrum, but in some cases are comparable or even better than corresponding neutrino sensitivities of the IceCube detector. For VERITAS and the considered Cherenkov Telescope Array sites the expected neutrino sensitivities are up to factor 3 higher than for the MAGIC site because of the presence of surrounding mountains. |
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Keywords: | Cherenkov telescopes Tau neutrinos Extensive air showers |
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