出版社：SISSA, Scuola Internazionale Superiore di Studi Avanzati
摘要：We try to limit the neutrino oscillation parameters from the supernova neutrinos by studying the
MSW matter effect. The supernova neutrinos are generated in the core and propagate through the
envelope. It is pointed out that shock wave propagation has strong influences on the supernova
neutrino oscillation through the change of density profile.
Using an implicit Lagrangian code for general relativistic spherical hydrodynamics (Yamada,
1997), we succeeded in calculating propagation of shock waves which are generated by
adiabatic collapse of iron cores and pass into the stellar envelopes for more than »5s.
We examined how the influence of the shock wave appears in the neutrino spectrum, using density
profile obtained in our calculation. We confirmed that the influence of the shock wave appears
from low-energy side and moves toward high-energy side according to the shock propagation. In
addition, we calculated the neutrino signal that will be observed on the earth, and found that this
manner of the neutrino signal depends remarkably on the neutrino oscillation parameters. Therefore,
there is a possibility of constraining the neutrino oscillation parameters from the supernova
neutrino spectrum. Moreover, there is a possibility of finding the influence on the nucleosynthesis
by changing the neutrino spectrum.
