Neutrino Mixing Anarchy: Alive and Kicking

Details Neutrino Mixing Anarchy: Alive and Kicking Neutrino Mixing Anarchy: Alive and Kicking

2012-04-05

arxiv.org/abs/1204.1249v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

4 eps figures

Scientific paper

Neutrino mixing anarchy is the hypothesis that the leptonic mixing matrix can be described as the result of a random draw from an unbiased distribution of unitary three-by-three matrices. In light of the recent very strong evidence for a nonzero sin^2(theta_13), we show that the anarchy hypothesis is consistent with the choice made by the Nature -- the probability of a more unusual choice is 44%. We revisit anarchy's ability to make predictions, concentrating on correlations - or lack thereof - among the different neutrino mixing parameters, especially sin^2(theta_13) and sin^2(theta_23). We also comment on anarchical expectations regarding the magnitude of CP-violation in the lepton sector, and potential connections to underlying flavor models or the landscape.

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