{"paper":{"title":"Line shapes in \\Upsilon(5S) \\to B^{(*)} \\bar{B}^{(*)}\\pi with Z(10610) and Z(10650) using effective field theory","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"hep-ph","authors_text":"Josh Powell (Duke U.), Thomas Mehen","submitted_at":"2013-06-23T19:14:10Z","abstract_excerpt":"The Belle collaboration recently discovered two resonances, $Z_b(10610)$ and $Z_b(10650)$ --- denoted $Z_b$ and $Z_b^\\prime$ --- in the decays $\\Upsilon(5S) \\to \\Upsilon(nS) \\pi^+ \\pi^-$ for $n$ = 1, 2, or 3, and $\\Upsilon(5S) \\to h_b(mP) \\pi^+ \\pi^-$ for $m = 1$ or 2. These resonances lie very close to the $B^* \\bar{B}$ and $B^* \\bar{B}^*$ thresholds, respectively. A recent Belle analysis of the three-body decays $\\Upsilon(5S) \\to [B^{(*)} \\bar{B}^{(*)}]^{\\mp} \\pi^\\pm$ gives further evidence for the existence of these states. In this paper we analyze this decay using an effective theory of $B"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1306.5459","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"}