Cosmological Neutrino Mass Limit Revisited
| dc.creator | Enqvist, K. | |
| dc.creator | Uibo, H. | |
| dc.date | 1992-11-25 | |
| dc.date.accessioned | 2026-07-07T10:34:55Z | |
| dc.date.available | 2026-07-07T10:34:55Z | |
| dc.description | We consider the equilibration of the 'wrong--helicity' Dirac neutrino states $ν_{+}$ and $\overlineν_{-}$ in the early Universe via weak interactions and calculate carefully the thermally averaged production rate, taking into account all the relevant scattering and decay processes. Requiring that the production rate is less than the Hubble parameter at the onset of QCD phase transition so that the nucleosynthesis predictions are not contradicted, we find for $T_{\rm{QCD}}\simeq 200$ MeV the upper limits $m_{ν_τ}\lsim 740$ keV and $m_{ν_μ}\lsim 480$ keV. | |
| dc.description | 11 pages (2 figures available on request), NORDITA-92/87 P | |
| dc.identifier | https://arxiv.org/abs/hep-ph/9211307 | |
| dc.identifier | http://arxiv.org/abs/hep-ph/9211307 | |
| dc.identifier | Phys.Lett.B301:376-381,1993 | |
| dc.identifier | doi:10.1016/0370-2693(93)91166-K | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/179602 | |
| dc.subject | High Energy Physics - Phenomenology | |
| dc.title | Cosmological Neutrino Mass Limit Revisited | |
| dc.type | text |