Physics of supernova neutrinos

Cecilia Lunardini, A. Yu Smirnov

Research output: Contribution to journalConference article

Abstract

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 languageEnglish (US)
JournalProceedings of Science
Volume10
StatePublished - Jan 1 2003
Externally publishedYes
Event2003 International Workshop on Astroparticle and High Energy Physics, AHEP 2003 - Valencia, Spain
Duration: Oct 14 2003Oct 18 2003

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supernovae
neutrinos
hierarchies
physics
exclusion
regeneration
energy
energy distribution
energy spectra
intervals
sensitivity

ASJC Scopus subject areas

  • General

Cite this

Physics of supernova neutrinos. / Lunardini, Cecilia; Smirnov, A. Yu.

In: Proceedings of Science, Vol. 10, 01.01.2003.

Research output: Contribution to journalConference article

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