{"paper":{"title":"Why pentaquarks are seen in some experiments and not in others","license":"","headline":"","cross_cats":[],"primary_cat":"hep-ph","authors_text":"Harry J. Lipkin","submitted_at":"2005-01-23T20:17:51Z","abstract_excerpt":"The $\\Theta^+$ Pentaquark is a Very narrow $\\Gamma \\approx 1$ MeV\n KN Resonance. Why do some experiments see it and others do not? The lowest quark configuration that can describe it is exotic $uudd \\bar s$.\n Why have no exotics been seen before?\n Is this the beginning of a new spectroscopy? Can it help toteach us about How QCD makes hadrons from quarks and gluons?"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"hep-ph/0501209","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"}