Nearly Degenerate Neutrinos and Broken Flavour Symmetry
| dc.creator | Barbieri, Riccardo | |
| dc.creator | Hall, Lawrence J. | |
| dc.creator | Kane, G. L. | |
| dc.creator | Ross, Graham G. | |
| dc.date | 1999-01-05 | |
| dc.date.accessioned | 2026-07-07T04:06:10Z | |
| dc.date.available | 2026-07-07T04:06:10Z | |
| dc.description | Theories with non-Abelian flavour symmetries lead at zeroth order to neutrino degeneracy and massless charged fermions. The flavour symmetry is spontaneously broken sequentially to give hierarchies $Δm_{atm}^2 \gg Δm_{\odot}^2$ and $m_τ\gg m_μ\gg m_e$, and a misalignment of the vacuum between neutrino and charged sectors gives large $θ_{atm}$. Explicit models are given which determine $θ_{atm} = 45^\circ$. A similar construction gives vacuum misalignment for the lighter generations and gives a vanishing $ββ_{0 ν}$ rate, so that there is no laboratory constraint on the amount of neutrino hot dark matter in the universe, and the solar mixing angle is also maximal, $θ_\odot = 45^\circ$. | |
| dc.description | 10 pages | |
| dc.identifier | https://arxiv.org/abs/hep-ph/9901228 | |
| dc.identifier | http://arxiv.org/abs/hep-ph/9901228 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/48660 | |
| dc.subject | High Energy Physics - Phenomenology | |
| dc.title | Nearly Degenerate Neutrinos and Broken Flavour Symmetry | |
| dc.type | text |