Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2011-09-15
Nucl.Phys.B857:411-423,2012
Physics
High Energy Physics
High Energy Physics - Phenomenology
16 pages, 13 figures, references added, version matches publication in Nucl. Phys. B
Scientific paper
10.1016/j.nuclphysb.2011.12.017
We reconsider the phenomenological implications of two texture zeros in symmetric neutrino mass matrices in the light of the recent T2K result for the reactor angle and the new global analysis which gives also best fit values for the Dirac CP phase delta. The most important results of the analysis are: Among the viable cases classified by Frampton et al. only A1 and A2 predict the reactor mixing angle to be different from zero at 3 sigma. Furthermore these two cases are compatible only with a normal mass spectrum in the allowed region for the reactor angle. At the best fit value A1 and A2 predict 0.024 >= sin^2(theta13) >= 0.012 and 0.014 <= sin^2(theta13) <= 0.032, respectively, where the bounds on the right and the left correspond to cos(delta)=-1 and cos(delta)=1, respectively. The cases B1, B2, B3 and B4 predict nearly maximal CP violation, i.e. cos(delta) is approximately zero.
Ludl Patrick Otto
Morisi Stefano
Peinado Eduardo
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