{"paper":{"title":"Free parameters in quantum field theories: an analysis of the variational approach","license":"","headline":"","cross_cats":["hep-th","quant-ph"],"primary_cat":"hep-ph","authors_text":"Fabio L. Braghin","submitted_at":"2002-11-22T20:57:44Z","abstract_excerpt":"The usual renormalization procedure for the variational approximation with a trial Gaussian ansatz for the $\\lap$ model in 3+1 dimensions is re-analysed as a departing framework for the investigation of the parameters of the model. The so-called asymmetric phase of the model (where $<vac|\\phi |vac> \\neq 0$) is considered for the search of privileged values of these parameters (mass and coupling constant) and possible conditions they may be expected to satisfy. This also may yield a suitable approach for the investigation of the reliability and stability of the approximation. The extremization "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"hep-ph/0211364","kind":"arxiv","version":3},"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"}