Non-Boltzmann behavior in models of interacting neutrinos
- School of Physics, University of Melbourne, Victoria Australia 3010 (Australia)
We reconsider the question of the relative importance of single-particle effects and correlations in the solvable interacting neutrino models introduced by Friedland and Lunardini and by Bell, Rawlinson, and Sawyer. We show, by an exact calculation, that the two particle correlations are not 'small', and that they dominate the time evolution in these models, in spite of indications to the contrary from the rate of equilibration. This result holds even after the model in generalized from the original 2 flavor case to N flavors. The failure of the Boltzmann single-particle approximation in this model is tentatively attributed to the simplicity of the model, in particular, to the assumption that all neutrinos in the initial state are in flavor eigenstates.
- OSTI ID:
- 21308504
- Journal Information:
- Physical Review. D, Particles Fields, Vol. 80, Issue 1; Other Information: DOI: 10.1103/PhysRevD.80.013011; (c) 2009 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2821
- Country of Publication:
- United States
- Language:
- English
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