{"paper":{"title":"Problems of Perturbation Series in Non-Equilibrium Quantum Field Theories","license":"","headline":"","cross_cats":[],"primary_cat":"hep-ph","authors_text":"D. Seibert, T. Altherr","submitted_at":"1994-05-27T10:06:46Z","abstract_excerpt":"In the standard framework of non-equilibrium quantum field theories, the pinch singularities associated to multiple products of $\\delta$-functions do not cancel in a perturbative expansion unless the particle distributions are those for a system in thermal and chemical equilibrium."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"hep-ph/9405396","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"}