Getting at large theta_13 with almost maximal theta_23 from tri-bimaximal mixing

Details Getting at large theta_13 with almost maximal theta_23 from tri-bimaximal mixing Getting at large theta_13 with almost maximal theta_23 from tri-bimaximal mixing

2011-06-26

arxiv.org/abs/1106.5211v3

Phys.Rev.D84:037301,2011

Physics

High Energy Physics

High Energy Physics - Phenomenology

v1:7 pages, 1 figure; v2:added references and short comments; v3:typos corrected, final version

Scientific paper

10.1103/PhysRevD.84.037301

We introduce a small correction term, \delta M_\nu, in the neutrino sector and examine whether a large \theta_13 and an almost maximal \theta_23 can simultaneously be obtained starting from the tri-bimaximal neutrino mixing. It is found that one can easily gain \theta_13 \simeq 10^\circ, which is favored by the recent T2K experiment, by taking account of the enhancement due to the degeneracy among three neutrino masses. We also find that (\delta M_\nu)_22=(\delta M_\nu)_33 is a key condition for \theta_23 \simeq 45^\circ.

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