{"paper":{"title":"Gauge-Coupling Unification and the Minimal SUSY Model: A Fourth Generation Below the Top?","license":"","headline":"","cross_cats":[],"primary_cat":"hep-ph","authors_text":"Douglas W. McKay, H. Pois, J.F. Gunion","submitted_at":"1994-06-08T03:10:24Z","abstract_excerpt":"We explore the possibility of a fourth generation in the gauge-coupling-unified, minimal supersymmetric (MSSM) framework. We find that a sequential fourth generation (with a heavy neutrino $\\nu'$) can still fit, surviving all present experimental constraints, provided $\\lambda_b(M_U)=\\lambda_\\tau(M_U)$ Yukawa unification is relaxed. For the theory to remain perturbative up to $M_U$, the new leptonic generation must lie within reach of LEP-II and the new $b',t'$ must have masses within the reach of the Tevatron. For example, for $\\mt>150\\gev$ we find $m_{\\nu'},m_{\\tau'}< 86\\gev$, $m_{t'}<178$, "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"hep-ph/9406249","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"}