An algorithm for the reconstruction of high-energy neutrino-induced particle showers and its application to the ANTARES neutrino telescope
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A novel algorithm to reconstruct neutrino-induced particle showers within the ANTARES neutrino telescope is presented. The method achieves a median angular resolution of 6°6° for shower energies below 100 TeV. Applying this algorithm to 6 years of data taken with the ANTARES detector, 8 events with reconstructed shower energies above 10 TeV are observed. This is consistent with the expectation of about 5 events from atmospheric backgrounds, but also compatible with diffuse astrophysical flux measurements by the IceCube collaboration, from which 2–4 additional events are expected. A 90%90% C.L. upper limit on the diffuse astrophysical neutrino flux with a value per neutrino flavour of E2·F90%=4.9·10-8GeV·cm-2·s-1·sr-1E2·F90%=4.9·10-8GeV·cm-2·s-1·sr-1 is set, applicable to the energy range from 23 TeV to 7.8 PeV, assuming an unbroken E-2E-2 spectrum and neutrino flavour equipartition at Earth.
CitationAlbert, A., Andre, M., Anghinolfi, M., Anton, G., Avgitas, T., Bertin, V., Bormuth, R., Puricelli, S., Coniglione, R., Lefèvre, D., Michael, T., Pellegrino, C., Piattelli, P., Sanchez-Losa, A., Trovato, A., Zúñiga, J. An algorithm for the reconstruction of high-energy neutrino-induced particle showers and its application to the ANTARES neutrino telescope. "European physical journal C", 21 Juny 2017, vol. 77, núm. 6.