Cosmological Neutrino Condensates

Details Cosmological Neutrino Condensates Cosmological Neutrino Condensates

1999-03-19

arxiv.org/abs/hep-ph/9903416v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

9 pages, LaTeX

Scientific paper

We investigate the possibility that neutrinos form superfluid-type condensates in background cosmological densities. Such condensates could give rise to small neutrino masses and splittings, as well as an important contribution, perhaps, to the cosmological constant. We discuss various channels in the context of the standard model. Many of these do not support a condensate, but some mixed-flavor channels do. We also suggest a new interaction, acting only among neutrinos, that could induce a neutrino Majorana mass of order 1 eV.

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