Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2001-06-26
Phys.Lett. B517 (2001) 158-166
Physics
High Energy Physics
High Energy Physics - Phenomenology
references added, to appear in PLB
Scientific paper
10.1016/S0370-2693(01)00962-5
We consider analytically the domain of the three mixing angles $\Theta_{ij}$ and the CP phase $\delta$ for three flavour neutrino oscillations both in vacuum and matter. Similarly to the quark sector, it is necessary and sufficient to let all the mixing angles $\Theta_{12},\Theta_{13},\Theta_{23}$ and $\delta$ be in the range $<0,\frac{\pi}{2}>$ and $0 \leq \delta < 2 \pi$, respectively. To exploit the full range of $\delta$ will be important in future when more precise fits are possible, even without CP violation measurements. With the above assumption on the angles we can restrict ourselves to the natural order of masses $m_1
Gluza Janusz
Zralek Marek
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