Closing the Windows on Mev Tau Neutrinos
| dc.creator | Babu, K. S. | |
| dc.creator | Gould, T. M. | |
| dc.creator | Rothstein, I. Z. | |
| dc.date | 1993-10-26 | |
| dc.date.accessioned | 2026-07-07T10:35:01Z | |
| dc.date.available | 2026-07-07T10:35:01Z | |
| dc.description | In this note, we analyze various constraints on the ``visible'' decay modes of a massive $τ$ neutrino, $ν_τ\rightarrowν^\prime\,γ$ and $ν_τ\rightarrowν^\prime\, e^+ e^-$, where $ν^\prime$ is a light neutrino. The BEBC beam dump experiment provides model-independent constraints on these modes. The lifetime for the $ν^\prime\, e^+e^-$ mode is constrained to be $τ_{ν^\prime\, e^+e^-} \ge 0.18~(m_{ν_τ}/MeV)~sec.$ We point out that the same experiment implies a similar constraint on the $ν^\prime\,γ$ mode. This results in a new upper limit on the transition magnetic moment of $ν_τ$, $μ_{\rm tran} \le 1.1 \times 10^{-9} (MeV/m_{ν_τ})^2 μ_B $. Furthermore, a limit on the electric charge of $ν_τ$ may be obtained, $Q_{ν_τ} \le 4 \times 10^{-4}e$. Combining these constraints with those arising from supernova observations and primordial nucleosynthesis calculations, we show that these ``visible'' decays cannot be the dominant decay modes of the $τ$ neutrino. | |
| dc.description | 8 pgs. LaTeX (1 uuencoded fig., also available on request), Bartol-930XXX, JHU-TIPAC-930026, UM-TH-93-26 | |
| dc.identifier | https://arxiv.org/abs/hep-ph/9310349 | |
| dc.identifier | http://arxiv.org/abs/hep-ph/9310349 | |
| dc.identifier | Phys.Lett.B321:140-144,1994 | |
| dc.identifier | doi:10.1016/0370-2693(94)90340-9 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/179634 | |
| dc.subject | High Energy Physics - Phenomenology | |
| dc.title | Closing the Windows on Mev Tau Neutrinos | |
| dc.type | text |