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Can the Zee Model Explain the Observed Neutrino Data?

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arxiv hep-ph/0104226 v3 pith:UFG5LMO6 submitted 2001-04-23 hep-ph

Can the Zee Model Explain the Observed Neutrino Data?

classification hep-ph
keywords solardeltamodelthetadatamixingobservedsolution
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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The eigenvalues and mixing angles in the Zee model are investigated parameter-independently. When we require |\Delta m^2_{12}/\Delta m^2_{23}| \ll 1 in order to understand the solar and atmospheric data simultaneously, the only solution is one which gives bi-maximal mixing. It is pointed out that the observed values \sin^2 2\theta_{solar} \simeq 0.66 in the MSW LMA solution cannot be explained within the framework of the Zee model, because we derive a severe constraint on the value of \sin^2 2 \theta_{solar}, \sin^2 2 \theta_{solar} \geq 1 -(1/16)(\Delta m^2_{solar}/\Delta m^2_{atm})^2.

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  1. Zee models with a non-invertible $Z_M$ symmetry

    hep-ph 2026-05 unverdicted novelty 5.0

    Zee models are classified under non-invertible Z_M symmetries; viable candidates are identified from data consistency, and a Z_7 benchmark yields numerical predictions for neutrino parameters and CLFV rates.