{"paper":{"title":"$b \\to s(d) \\gamma$ with a Vector-like Quark as Fourth-generation","license":"","headline":"","cross_cats":[],"primary_cat":"hep-ph","authors_text":"L.T. Handoko, T. Morozumi Pages : 19 pages","submitted_at":"1994-09-07T05:14:06Z","abstract_excerpt":"We study the implications of a vector-like quark, especially a down-type vector-like quark in $b \\rightarrow s(d) \\gamma$ including the neutral Higgs in the calculation. After analyzing some possible constraints for the mixing, the contribution may be significant for the $b \\rightarrow d \\gamma$, but not for the $b \\rightarrow s \\gamma$. We also find that the FCNC among ordinary quarks vanishes for a special form of down-type quark mass matrix."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"hep-ph/9409240","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"}