{"paper":{"title":"Production of the $\\eta_b(nS)$ states","license":"","headline":"","cross_cats":[],"primary_cat":"hep-ph","authors_text":"Jonathan L. Rosner, Stephen Godfrey","submitted_at":"2001-04-24T23:07:15Z","abstract_excerpt":"The rates for magnetic dipole (M1) transitions $\\Upsilon(nS) \\to \\eta_b(n'S) + \\gamma$, $n' \\le n$, are compared. The photon energies for allowed ($n' = n$) M1 transitions are very small, so hindered ($n' < n$) transitions could be more favorable for discovering the $\\eta_b(1S,2S)$. The question then arises whether $\\Upsilon(2S)$ or $\\Upsilon(3S)$ is a better source of $\\eta_b(1S)$. Whereas one nonrelativistic model favors $\\eta_b(1S)$ production from $\\Upsilon(2S)$, this advantage is lost when relativistic corrections are taken into account, and is not common to all sets of wave functions eve"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"hep-ph/0104253","kind":"arxiv","version":5},"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"}