A new event reconstruction algorithm based on a maximum likelihood method has been developed for Super-Kamiokande. Its improved kinematic and particle identification capabilities enable the analysis of atmospheric neutrino data in a detector volume 32% larger than previous analyses and increase the sensitivity to the neutrino mass hierarchy. Analysis of a 253.9 kton.year exposure of the Super-Kamiokande IV atmospheric neutrino data has yielded a weak preference for the normal hierarchy, disfavoring the inverted hierarchy at 74% assuming oscillations at the best fit of the analysis.

Atmospheric neutrino oscillation analysis with improved event reconstruction in Super-Kamiokande IV / Jiang, M., Abe, K., Bronner, C., Hayato, Y., Ikeda, M., Iyogi, K., Kameda, J., Kato, Y., Kishimoto, Y., Marti, L., Miura, M., Moriyama, S., Mochizuki, T., Nakahata, M., Nakajima, Y., Nakano, Y., Nakayama, S., Okada, T., Okamoto, K., Orii, A., et al.. - In: PROGRESS OF THEORETICAL AND EXPERIMENTAL PHYSICS. - ISSN 2050-3911. - 2019:5(2019). [10.1093/ptep/ptz015]

Atmospheric neutrino oscillation analysis with improved event reconstruction in Super-Kamiokande IV

Calabria, NF;Intonti, RA;Rosa, G;Ali, A;
2019

Abstract

A new event reconstruction algorithm based on a maximum likelihood method has been developed for Super-Kamiokande. Its improved kinematic and particle identification capabilities enable the analysis of atmospheric neutrino data in a detector volume 32% larger than previous analyses and increase the sensitivity to the neutrino mass hierarchy. Analysis of a 253.9 kton.year exposure of the Super-Kamiokande IV atmospheric neutrino data has yielded a weak preference for the normal hierarchy, disfavoring the inverted hierarchy at 74% assuming oscillations at the best fit of the analysis.
2019
Atmospheric neutrino oscillation analysis with improved event reconstruction in Super-Kamiokande IV / Jiang, M., Abe, K., Bronner, C., Hayato, Y., Ikeda, M., Iyogi, K., Kameda, J., Kato, Y., Kishimoto, Y., Marti, L., Miura, M., Moriyama, S., Mochizuki, T., Nakahata, M., Nakajima, Y., Nakano, Y., Nakayama, S., Okada, T., Okamoto, K., Orii, A., et al.. - In: PROGRESS OF THEORETICAL AND EXPERIMENTAL PHYSICS. - ISSN 2050-3911. - 2019:5(2019). [10.1093/ptep/ptz015]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11589/251761
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