Neutrino masses and LFV from minimal breaking of U(3)^5 and U(2)^5 flavor symmetries

Details Neutrino masses and LFV from minimal breaking of U(3)^5 and U(2)^5 flavor symmetries Neutrino masses and LFV from minimal breaking of U(3)^5 and U(2)^5 flavor symmetries

2012-04-03

arxiv.org/abs/1204.0688v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

10 pages, 5 figures

Scientific paper

We analyze neutrino masses and Lepton Flavor Violation (LFV) in charged leptons with a minimal ansatz about the breaking of the U(3)^5 flavor symmetry, consistent with the U(2)^3 breaking pattern of quark Yukawa couplings, in the context of supersymmetry. Neutrino masses are expected to be almost degenerate, close to present bounds from cosmology and $0\nu\beta\beta$ experiments. We also predict $s_{13} \approx s_{23} |V_{td}|/|V_{ts}| \approx 0.16$, in perfect agreement with the recent DayaBay result. For slepton masses below 1 TeV, barring accidental cancellations, we expect $\cB(\mu \to e \gamma) > 10^{-13}$ and $\cB(\tau \to \mu \gamma) > 10^{-9}$, within the reach of future experimental searches.

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