Retrieval of energy spectra for all flavor of neutrinos from core-collapse supernova with multiple detectors

Understand

We present a new method by which to retrieve energy spectrum for all flavor of neutrinos from core-collapse supernova (CCSN).

• In the retrieval process, we do not assume any analytic formulae to express the energy spectrum of neutrinos but rather take a direct way of spectrum reconstruction from the observed data; the Singular Value Decomposition algorithm with a newly developed adaptive energy-gridding technique is adopted.
• We employ three independent reaction channels having different flavor sensitivity to neutrinos.
• Two reaction channels, inverse beta decay on proton and elastic scattering on electrons, from a water Cherenkov detector such as Super-Kamiokande (SK) and Hyper-Kamiokande (HK), and a charged current reaction channel with Argon from the Deep Underground Neutrino Experiment (DUNE) are adopted.