Charged-current scattering off the 16 O nucleus as a detection channel for supernova neutrinos

Ken'ichiro Nakazato, Toshio Suzuki, Makoto Sakuda

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Abstract

Event spectra of neutrino- 16 O charged-current reactions at Super-Kamiokande are evaluated for a future supernova neutrino burst. Since these channels are expected to be useful for diagnosing a neutrino spectrum with high average energy, the evaluations are performed not only for an ordinary supernova neutrino model but also for a model of neutrino emission from a black-hole-forming collapse. Using shell model results, whose excitation energies are consistent with the experimental data, the cross sections of the 16 O(ν e , e )X and 16 O(ν¯ e , e + )X reactions for each nuclear state with a different excitation energy are employed in this study. It is found that, owing to the components of the reaction with higher excitation energy, the event spectrum becomes 4-7 MeV softer than in the case without considering the excitation energies. In addition, a simplified approach to evaluating the event spectra is proposed for convenience, and its validity is examined.

Original languageEnglish
Article number123E02
JournalProgress of Theoretical and Experimental Physics
Volume2018
Issue number12
DOIs
Publication statusPublished - Jan 1 2018

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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