Sterile neutrino signals from supernovae

Journal Article · Sat Dec 15 04:00:00 EST 2007 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.76.125026· OSTI ID:21024091

Keraenen, P ^[1]; Maalampi, J ^[1]; Myyrylaeinen, M; Riittinen, J ^[1]

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1. Department of Physics, P.O. Box 35, FIN-40014, University of Jyvaeskylae (Finland)

We investigate the effects of a mixing of active and sterile neutrinos on the ratios of supernova electron neutrino flux (F{sub e}) and antineutrino flux (F{sub e}) to the total flux of the other neutrino and antineutrino flavors (F{sub a}). We assume that the heaviest (in the normal hierarchy) standard model neutrino {nu}{sub 3} mixes with a sterile neutrino resulting in a pair of mass eigenstates with a small mass gap. Using the density matrix formalism we solve numerically the evolution of neutrino states in the envelope of a supernova and determine the flux ratios F{sub e}/F{sub a} and F{sub e}/F{sub a} as a function of the active-sterile mixing angle and for the experimentally allowed range of the standard active-active mixing angle {theta}{sub 13}.

• OSTI ID: 21024091
• Journal Information: Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 12 Vol. 76; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ANTINEUTRINOS
DENSITY MATRIX
EIGENSTATES
ELECTRON NEUTRINOS
FLAVOR MODEL
REST MASS
STANDARD MODEL
SUPERNOVAE
WEINBERG ANGLE