Small mixing angle theta(13) and the lepton asymmetry

초록

We present the correlation of low-energy CP phases, both Dirac and Majorana, and the lepton asymmetry for the baryon asymmetry in the universe, with a certain class of Yukawa matrices that consist of two right-handed neutrinos whose mass ratio is about 2 x 10(-4) and include one texture zero in themselves. For cases in which the amount of the lepton asymmetry Y-L turns out to be proportional to theta(13)(2), we consider the constraint between two types of CP phases and the relation of Y-L versus the Jarlskog invariant or the amplitude of neutrinoless double beta decay as theta(13) varies.

키워드