Leptonic CP Violation Induced by Approximately mu-tau Symmetric Seesaw Mechanism

Details Leptonic CP Violation Induced by Approximately mu-tau Symmetric Seesaw Mechanism Leptonic CP Violation Induced by Approximately mu-tau Symmetric Seesaw Mechanism

2007-10-15

arxiv.org/abs/0710.2713v5

Phys.Rev.D77:075008,2008

Physics

High Energy Physics

High Energy Physics - Phenomenology

28 pages including 14 figures, several typos corrected, version to appear in Phys. Rev. D

Scientific paper

10.1103/PhysRevD.77.075008

Assuming a minimal seesaw model with two heavy neutrinos (N), we examine effects of leptonic CP violation induced by approximate mu-tau symmetric interactions. As long as N is subject to the mu-tau symmetry, we can choose CP phases of Dirac mass terms without loss of generality in such a way that these phases arise from mu-tau symmetry breaking interactions. In the case that no phase is present in heavy neutrino mass terms, leptonic CP phases are controlled by two phases alpha and beta. The similar consideration is extended to N blind to the mu-tau symmetry. It is argued that N subject (blind) to the mu-tau symmetry necessarily describes the normal (inverted) mass hierarchy. We restrict ourselves to mu-tau symmetric textures giving the tri-bimaximal mixing and calculate flavor neutrino masses to estimate CP-violating Dirac and Majorana phases as well as neutrino mixing angles as functions of alpha and beta. Since alpha and beta are generated by mu-tau symmetry breaking interactions, CP-violating Majorana phase tends to be suppressed and is found to be at most O(0.1) radian. On the other hand, CP-violating Dirac phase tends to show a proportionality to alpha or to beta.

Affiliated with

Also associated with

No associations

Rating

Leptonic CP Violation Induced by Approximately mu-tau Symmetric Seesaw Mechanism does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Leptonic CP Violation Induced by Approximately mu-tau Symmetric Seesaw Mechanism, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Leptonic CP Violation Induced by Approximately mu-tau Symmetric Seesaw Mechanism will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-126015