Corrections to Tribimaximal Mixing from Nondegenerate Phases

Details Corrections to Tribimaximal Mixing from Nondegenerate Phases Corrections to Tribimaximal Mixing from Nondegenerate Phases

2009-11-13

arxiv.org/abs/0911.2670v1

Mod.Phys.Lett.A25:63-78,2010

Physics

High Energy Physics

High Energy Physics - Phenomenology

19 pages 6 figures, Accepted by Mod. Phy. Lett. A

Scientific paper

10.1142/S0217732310031476

We propose a seesaw scenario that possible corrections to the tribimaximal pattern of lepton mixing are due to the small phase splitting of the right-handed neutrino mass matrix. we show that the small deviations can be expressed analytically in terms of two splitting parameters($\delta_1$ and $\delta_2$) in the leading order. The solar mixing angle $\theta_{12}$ favors a relatively smaller value compared to zero order value ($35.3^\circ$), and the Dirac type CP phase $\delta$ chooses a nearly maximal one. The two Majorana type CP phases $\rho$ and $\sigma$ turn out to be a nearly linear dependence. Also a normal hierarchy neutrino mass spectrum is favored due to the stability of perturbation calculations.

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