{"paper":{"title":"Effect of Initial Particle Instability in Muon Collisions","license":"","headline":"","cross_cats":[],"primary_cat":"hep-ph","authors_text":"I.F.Ginzburg","submitted_at":"1995-09-15T08:12:18Z","abstract_excerpt":"We study $\\mu^+\\mu^-$ collision with production of some state $F$ (for example, $F= W^+$) and $(e\\bar\\nu)$ system with the effective mass, which is less than muon mass. In this case the momentum $k$, transferred from $\\mu$ to $e\\bar\\nu$ system (virtual neutrino momentum), can be time--like. The path of integration over $k^2$ goes through the pole at $k^2=0$. It gives divergent cross section. This divergence disappears if the finite width $\\Gamma$ of initial $\\mu$ is taken into account. It gives the factor $\\propto\\Gamma^{-1}$ in cross section. The compensating factor $\\Gamma$ appears from $\\mu"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"hep-ph/9509314","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/hep-ph/9509314/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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"}