New Upper Limits on the Tau Neutrino Mass from Primordial Helium Considerations
| dc.creator | Dolgov, A. D. | |
| dc.creator | Rothstein, I. Z. | |
| dc.date | 1993-02-23 | |
| dc.date.accessioned | 2026-07-07T10:34:57Z | |
| dc.date.available | 2026-07-07T10:34:57Z | |
| dc.description | In this paper we reconsider recently derived bounds on $MeV$ tau neutrinos, taking into account previously unaccounted for effects. We find that, assuming that the neutrino life-time is longer than $O(100~sec)$, the constraint $N_{eff}<3.6$ rules out $ν_τ$ masses in the range $0.5~(MeV)<m_{ν_τ}<35~(MeV)$ for Majorana neutrinos and $0.74~(MeV)<m_{ν_τ}<35~(MeV)$ for Dirac neutrinos. Given that the present laboratory bound is 35 MeV, our results lower the present bound to $0.5$ and $0.74$ for Majorana and Dirac neutrinos respectively. | |
| dc.description | 9 pages (2 figures available upon request), UM-AC-93-02 | |
| dc.identifier | https://arxiv.org/abs/hep-ph/9302292 | |
| dc.identifier | http://arxiv.org/abs/hep-ph/9302292 | |
| dc.identifier | Phys.Rev.Lett.71:476-479,1993 | |
| dc.identifier | doi:10.1103/PhysRevLett.71.476 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/179613 | |
| dc.subject | High Energy Physics - Phenomenology | |
| dc.subject | Astrophysics | |
| dc.title | New Upper Limits on the Tau Neutrino Mass from Primordial Helium Considerations | |
| dc.type | text |