{"paper":{"title":"Lepton flavor changing in neutrinoless $\\tau$ decays","license":"","headline":"","cross_cats":[],"primary_cat":"hep-ph","authors_text":"X.Y. Pham","submitted_at":"1998-10-26T14:57:21Z","abstract_excerpt":"Neutrino oscillations, as recently reported by the Super-Kamiokande collaboration, imply that lepton numbers could be violated, and $\\tau^{\\pm}\\to \\mu^{\\pm}+\\ell^{+}+\\ell^{-},\\tau^{\\pm}\\to\\mu^{\\pm}+\\rho^0$ are some typical examples. We point out that in these neutrinoless modes, the GIM cancelation is much milder with only a logarithmic behavior $\\log (m_j /m_k)$ where $m_{j, k}$ are the neutrino masses. This is in sharp contrast with the vanishingly small amplitude $\\tau^{\\pm}\\to \\mu^{\\pm}+\\gamma$ strongly suppressed by the quadratic power $(m_j^2-m_k^2)/ M_{\\rm W}^2$. In comparison with the "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"hep-ph/9810484","kind":"arxiv","version":1},"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"}