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Nucleosynthesis constraints on active-sterile neutrino conversions in the early universe with random magnetic field

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Nucleosynthesis constraints on active-sterile neutrino conversions in the early universe with random magnetic field

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dc.contributor.author Semikoz, Victor B.
dc.contributor.author Furtado Valle, José Wagner
dc.date.accessioned 2015-09-25T10:27:37Z
dc.date.available 2015-09-25T10:27:37Z
dc.date.issued 1994
dc.identifier.citation Semikoz, Victor B. Furtado Valle, José Wagner 1994 Nucleosynthesis constraints on active-sterile neutrino conversions in the early universe with random magnetic field Nuclear Physics B 425 3 651 664
dc.identifier.uri http://hdl.handle.net/10550/47232
dc.description.abstract We consider active-sterile neutrino conversions in the early universe hot plasma in the presence of a random magnetic field generated at the electroweak phase transition. Within a random field domain the magnetization asymmetry of the lepton antilepton plasma produced by a uniform constant magnetic field is huge in contrast to their small density asymmetry, leading to a drastic change in the active-sterile conversion rates. Assuming that the random field provides the seed for the galactic field one can estimate the restrictions from primordial nucleosynthesis. Requiring that the extra sterile \neu does not enter in equilibrium with the active ones before nucleosynthesis we find limits of the oscillation parameters which are stronger than in the isotropic case.
dc.language.iso eng
dc.relation.ispartof Nuclear Physics B, 1994, vol. 425, num. 3, p. 651-664
dc.subject Física
dc.title Nucleosynthesis constraints on active-sterile neutrino conversions in the early universe with random magnetic field
dc.type journal article es_ES
dc.date.updated 2015-09-25T10:27:38Z
dc.identifier.doi 10.1016/0550-3213(94)90292-5
dc.identifier.idgrec 073569
dc.rights.accessRights open access es_ES

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