NONEQUILIBRIUM NEUTRINO OSCILLATIONS IN THE EARLY UNIVERSE WITH AN INVERTED NEUTRINO-MASS HIERARCHY

Authors
KOSTELECKY VA SAMUEL S
Citation
Va. Kostelecky et S. Samuel, NONEQUILIBRIUM NEUTRINO OSCILLATIONS IN THE EARLY UNIVERSE WITH AN INVERTED NEUTRINO-MASS HIERARCHY, Physics letters. Section B, 385(1-4), 1996, pp. 159-168
Citations number
23
Categorie Soggetti
Physics
Journal title
Physics letters. Section B → ACNP
ISSN journal
03702693
Volume
385
Issue
1-4
Year of publication
1996
Pages
159 - 168
Database
ISI
SICI code
0370-2693(1996)385:1-4<159:NNOITE>2.0.ZU;2-U
Abstract
The annihilation of electron-positron pairs around one second after th e big bang distorts the Fermi-Dirac spectrum of neutrino energies. We determine the distortions assuming neutrino mixing with an inverted ne utrino-mass hierarchy. Nonequilibrium thermodynamics, the Boltzmann eq uation, and numerical integration are used to achieve the results. The various types of neutrino behavior are established as a function of m asses and mixing angles.