CP-violation from non-unitary leptonic mixing

Details CP-violation from non-unitary leptonic mixing CP-violation from non-unitary leptonic mixing

2007-03-08

arxiv.org/abs/hep-ph/0703098v2

Phys.Lett.B649:427-435,2007

Physics

High Energy Physics

High Energy Physics - Phenomenology

14 pages, 4 eps figures. References updated

Scientific paper

10.1016/j.physletb.2007.03.069

A low-energy non-unitary leptonic mixing matrix is a generic effect of a large class of theories accounting for neutrino masses. It is shown how the extra CP-odd phases of a general non-unitary matrix allow for sizeable CP-asymmetries in channels other than those dominant in the standard unitary case. The $\nu_\mu\to \nu_\tau$ channel turns out to be an excellent tool to further constrain moduli and phases. Furthermore, we clarify the relationship between our approach and the so-called "non-standard neutrino interactions" schemes: the sensitivities explored here apply as well to such constructions.

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