I review the effects of flavor conversion of neutrinos from stellar collapse due to masses and mixing, and discuss the motivations for their study. I consider in detail the sensitivity of certain observables (characteristics of the energy spectra of νe and ν¯e events) to the 13-mixing (sin2 θ13) and to the type of mass hierarchy/ordering (sign[∆m2 13]). These observables are: the ratio of average energies of the spectra, rE ≡ hEi/hĒi, the ratio of widths of the energy distributions, rΓ ≡ Γ/Γ, ¯ the ratios of total numbers of νe and ν¯e events at low energies, S, and in the high energy tails, Rtail. I show that regions in the space of observables rE, rΓ, Rtail exist in which certain mass hierarchy and intervals of sin2 θ13 can be identified or discriminated. Finally, I discuss the potential of studying regeneration effects on νe and ν¯e in the matter of the Earth and point out that both the observation or exclusion of these effects lead to model-independent information on sin2 θ13 and the mass hierarchy.
|Original language||English (US)|
|Journal||Proceedings of Science|
|State||Published - 2003|
|Event||2003 International Workshop on Astroparticle and High Energy Physics, AHEP 2003 - Valencia, Spain|
Duration: Oct 14 2003 → Oct 18 2003
ASJC Scopus subject areas