{"paper":{"title":"The top-quark mass in SU(5)xU(1) supergravity","license":"","headline":"","cross_cats":[],"primary_cat":"hep-ph","authors_text":"A. Zichichi, D. Nanopoulos, J. Lopez","submitted_at":"1994-02-04T05:22:43Z","abstract_excerpt":"We show that the currently experimentally preferred values of the top-quark mass (\\ie, $130\\lsim m_t\\lsim180\\GeV$) are naturally understood in the context of string models, where the top-quark Yukawa coupling at the string scale is generically given by $\\lambda_t={\\cal O}(g)$, with $g$ the unified gauge coupling. A detailed study of the Yukawa sector of $SU(5)\\times U(1)$ supergravity shows that the ratio of the bottom-quark to tau-lepton Yukawa couplings at the string scale is required to be in the range $0.7\\lsim\\lambda_b/\\lambda_\\tau\\lsim1$, depending on the values of $m_t$ and $m_b$. This "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"hep-ph/9402226","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"}