Nucleosynthesis and the mass of the tau neutrino

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dc.creatorHannestad, Steen
dc.creatorMadsen, Jes
dc.date1996-03-01
dc.date.accessioned2026-07-07T10:33:18Z
dc.date.available2026-07-07T10:33:18Z
dc.descriptionThe primordial abundance of long-lived heavy Majorana neutrinos is calculated from the full Boltzmann equation. Inclusion of scattering reactions drastically change the predicted abundance of a heavy neutrino species. This loosens the well known mass constraint on MeV neutrinos from Big Bang nucleosynthesis, and allows for the existence of a Majorana tau neutrino with mass m > 11 MeV. Further experimental efforts are therefore needed to investigate the range 11 MeV < m < 24 MeV. Some interesting cosmological consequences of an MeV nu_tau are also pointed out.
dc.description10 pages (REVTeX), 4 ps figures. To appear in Physical Review Letters
dc.identifierhttps://arxiv.org/abs/hep-ph/9603201
dc.identifierhttp://arxiv.org/abs/hep-ph/9603201
dc.identifierPhys.Rev.Lett.76:2848-2851,1996; Erratum-ibid.77:5148,1996
dc.identifierdoi:10.1103/PhysRevLett.76.2848
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/179060
dc.subjectHigh Energy Physics - Phenomenology
dc.subjectAstrophysics
dc.titleNucleosynthesis and the mass of the tau neutrino
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