Tribimaximal neutrino mixing, A_{} and the modular symmetry
Abstract
We formulate and discuss a 4dimensional SUSY version of an A model for tribimaximal neutrino mixing which is completely natural. We also study the nexttotheleading corrections and show that they are small, once the ratios of A breaking VEVs to the cutoff are fixed in a specified interval. We also point out an interesting way of presenting the A group starting from the modular group. In this approach, which could be interesting in itself as an indication on a possible origin of A, the Lagrangian basis where the symmetry is formulated coincides with the basis where the charged leptons are diagonal. If the same classification structure in A is extended from leptons to quarks, the CKM matrix coincides with the unit matrix in leading order and a study of nonleading corrections shows that the departures from unity of the CKM matrix are far too small to accomodate the observed mixing angles.
 Publication:

Nuclear Physics B
 Pub Date:
 May 2006
 DOI:
 10.1016/j.nuclphysb.2006.02.015
 arXiv:
 arXiv:hepph/0512103
 Bibcode:
 2006NuPhB.741..215A
 Keywords:

 High Energy Physics  Phenomenology
 EPrint:
 21 pages, 1 figure