{"paper":{"title":"Predictions on the second-class current decays $\\tau^{-}\\to\\pi^{-}\\eta^{(\\prime)}\\nu_{\\tau}$","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["hep-ex"],"primary_cat":"hep-ph","authors_text":"Pablo Roig, Rafel Escribano, Sergi Gonzalez-Solis","submitted_at":"2016-01-15T16:37:47Z","abstract_excerpt":"We analyze the second-class current decays $\\tau^{-}\\to\\pi^{-}\\eta^{(\\prime)}\\nu_{\\tau}$ in the framework of Chiral Perturbation Theory with resonances. Taking into account $\\pi^{0}$-$\\eta$-$\\eta^{\\prime}$ mixing, the $\\pi^{-}\\eta^{(\\prime)}$ vector form factor is extracted, in a model-independent way, using existing data on the $\\pi^{-}\\pi^{0}$ one. For the participant scalar form factor, we have considered different parameterizations ordered according to their increasing fulfillment of analyticity and unitarity constraints. We start with a Breit-Wigner parameterization dominated by the $a_{0"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1601.03989","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"}