{"paper":{"title":"A discrete symmetry group for maximal atmospheric neutrino mixing","license":"","headline":"","cross_cats":[],"primary_cat":"hep-ph","authors_text":"L. Lavoura, W. Grimus","submitted_at":"2003-05-05T15:30:33Z","abstract_excerpt":"We propose a discrete non-abelian symmetry group which enforces maximal atmospheric neutrino mixing, while $\\theta_{13} = 0$ and the solar mixing angle $\\theta_{12}$ remains undetermined; without finetuning, $\\theta_{12}$ will be large but non-maximal. Our extension of the Standard Model has three right-handed neutrino singlets $\\nu_R$ and implements the seesaw mechanism. Furthermore, we have an enlarged scalar sector with three Higgs doublets and two scalar gauge singlets; the latter have masses and vacuum expectation values of the order of the seesaw scale. Lepton mixing stems exclusively fr"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"hep-ph/0305046","kind":"arxiv","version":2},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"}