Supernova constraints on neutrino oscillation and EoS for proto-neutron star

Abstract

Abstract. Core-collapse supernovae eject huge amount of flux of energetic neutrinos which affect explosive nucleosynthesis of rare isotopes like 7 Li, 11 B, 92 Nb, 138 La and 180 Ta and r-process elements. Several isotopes depend strongly on the neutrino flavor oscillation due to the Mikheyev-Smirnov-Wolfenstein (MSW) effect. We here discuss how to determine the neutrino temperatures and propose a method to determine still unknown neutrino oscillation parameters, mass hierarchy and θ 13 , simultaneously. Combining the recent experimental constraints on θ 13 with isotopic ratios of the light elements discovered in presolar grains from the Murchison meteorite, we show that our method suggests at a marginal preference for an inverted neutrino mass hierarchy. We also discuss supernova relic neutrinos that may indicate the softness of the equation of state (EoS) of nuclear matter as well as adiabatic conditions of the neutrino oscillation.

Light attenuation length of high quality linear alkyl benzene as liquid scintillator solvent for the JUNO experiment

“…The JUNO detector, which is under construction in Jiangmen, Guangdong, will measure the energy spectrum of the electron-antineutrinos originating from Yangjiang and Taishan nuclear reactors located at about 52 km away from the detector to determine the neutrino mass hierarchy, and perform sub-percent precision measurements on the value of the neutrino-mixing parameters [1]. By resolving the mass hierarchy, notably the relative masses of the three neutrino mass eigenstates currently known in the Standard Model, we may gain a better understanding of the nature of the neutrino flavor conversions and the origin of neutrino masses [2,3].…”