| Автор | Xing Zhi-Zhong |
| Дата выпуска | 2008-02-01 |
| dc.description | The observation of neutrino oscillations requires new physics beyond the standard model (SM). A SM-like gauge theory with p lepton families can be extended by introducing q heavy right-handed Majorana neutrinos but preserving its SU(2)<sub>L</sub>×U(1)<sub>Y</sub> gauge symmetry. The overall neutrino mass matrix M turns out to be a symmetric (p+q)×(p+q) matrix. Given p>q, the rank of M is in general equal to 2q, corresponding to 2q non-zero mass eigenvalues. The existence of (p-q) massless left-handed Majorana neutrinos is an exact consequence of the model, independent of the usual approximation made in deriving the Type-I seesaw relation between the effective p×p light Majorana neutrino mass matrix M<sub>ν</sub> and the q×q heavy Majorana neutrino mass matrix M<sub>R</sub>. In other words, the numbers of massive left- and right-handed neutrinos are fairly matched. A good example to illustrate this ``seesaw fair play rule'' is the minimal seesaw model with p=3 and q=2, in which one massless neutrino sits on the unbalanced seesaw. |
| Формат | application.pdf |
| Издатель | Institute of Physics Publishing |
| Копирайт | 2008 Chinese Physical Society and the Institute of High Energy Physics of the Chinese Academy of Sciences and the Institute of Modern Physics of the Chinese Academy of Sciences |
| Название | Massive and massless neutrinos on unbalanced seesawsSupported by National Natural Science Foundation of China (10425522) |
| Тип | paper |
| DOI | 10.1088/1674-1137/32/2/004 |
| Electronic ISSN | 2058-6132 |
| Print ISSN | 1674-1137 |
| Журнал | Chinese Physics C |
| Том | 32 |
| Первая страница | 96 |
| Последняя страница | 99 |
| Выпуск | 2 |
