Real and complex random neutrino mass matrices and θ13

Recently, it has been shown that one of the basic parameters of the neutrino sector, the so-called theta(13) angle is very small but quite probably nonzero. We argue that the small value of theta(13) can still be reproduced easily by a wide spectrum of randomly generated models of neutrino masses. For that we consider real and complex neutrino mass matrices, also including sterile neutrinos. A qualitative difference between results for real and complex mass matrices in the region of small theta(13) values is observed. We show that statistically the present experimental data prefers random models of neutrino masses with sterile neutrinos.