Type-(I+Ir) Seesaw SM+2 right-handed Majorana neutrinos NR+ 1 Higgs triplet A Clon=l yeh+lr Nrh epton +NRMRNR+ △iσ,G+hc SSB Cm=可ME +h Mr M R R Diagnolization R/ML M V R 0 S U/(M6 M 0 A Seesaw formula M=M-MMM L
SM + 2 right-handed Majorana neutrinos + 1 Higgs triplet Type-(I+II) Seesaw 1 T M M M M M L D R D − = − NR SSB Diagnolization Seesaw formula
Neutrino Mixing After iT/6 Tri-bimaximal diagnolization mixing pattern Harrison et al, 02: Z.Z. Xing, 0 Parameterization V= AV X G. He &A Zee, 03 12-13 13 S12C23-c1231323c12C23-s12S13S2 A=1 s2,0+O(s S12S23-C12513C23-c12823-S12813C23C13C23 3×3 unitary matri×)z.zxng,08 Nearly identity matri with Ci,= coS B, Si= sin i and si=e us, R=0+
Neutrino Mixing After diagnolization Tri-bimaximal mixing pattern Parameterization with 3×3 unitary matrix Nearly identity matrix Harrison et al, 02; Z. Z. Xing, 02; X. G. He & A. Zee, 03 Z. Z.Xing, 08