Relic density of neutrinos with primordial asymmetries
NAGIOS: RODERIC FUNCIONANDO

Relic density of neutrinos with primordial asymmetries

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Relic density of neutrinos with primordial asymmetries

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Pastor Carpi, Sergio; Pinto, Teguayco; Raffelt, Georg G.
This document is a artículoDate2009

Este documento está disponible también en : http://hdl.handle.net/10550/37349
We study flavor oscillations in the early universe, assuming primordial neutrino-antineutrino asymmetries. Including collisions and pair processes in the kinetic equations, we not only estimate the degree of flavor equilibration, but for the first time also kinetic equilibration among neutrinos and with the ambient plasma. Typically the restrictive BBN bound on the nue-antinue asymmetry indeed applies to all flavors as claimed in the previous literature, but fine-tuned initial asymmetries always allow for a large surviving neutrino excess radiation that may show up in precision cosmological data.

    Pastor Carpi, Sergio Pinto, Teguayco Raffelt, Georg G. 2009 Relic density of neutrinos with primordial asymmetries Physical Review Letters 102 24 241302-1 241302-4
http://dx.doi.org/10.1103/PhysRevLett.102.241302

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