{"paper":{"title":"$\\psi'$ Polarization as a test of colour octet quarkonium production","license":"","headline":"","cross_cats":[],"primary_cat":"hep-ph","authors_text":"I.Z. Rothstein, M. Beneke","submitted_at":"1995-09-23T17:08:23Z","abstract_excerpt":"We calculate the $\\alpha_s$ corrections to the transverse polarization fraction of $\\psi^\\prime$'s produced at the Tevatron. If the `$\\psi^\\prime$-anomaly' is explained by gluon fragmentation into a colour octet Fock component of the $\\psi^\\prime$, the $\\psi^\\prime$'s should be $100\\%$ transversely polarized at leading order in $\\alpha_s$, up to spin symmetry breaking long-distance corrections. We find that the short-distance correction to the transverse polarization fraction is a few percent, so that a polarization measurement would provide a reliable test of the colour octet mechanism."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"hep-ph/9509375","kind":"arxiv","version":2},"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"}