{"paper":{"title":"Effect of coupled channels of the multi-channel pion-pion scattering in two-pion transitions of the $\\Upsilon$ mesons","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"hep-ph","authors_text":"M. Nagy, P. Byd\\v{z}ovsk\\'y, R. Kami\\'nski, T. Gutsche, V.E. Lyubovitskij, Yu.S. Surovtsev","submitted_at":"2015-09-07T14:01:57Z","abstract_excerpt":"The effect of isoscalar S-wave processes $\\pi\\pi\\to\\pi\\pi,K\\overline{K},\\eta\\eta$ is considered in the analysis of data (from the ARGUS, CLEO, CUSB, Crystal Ball, Belle, BABAR collaborations) on the bottomonia decays --- $\\Upsilon(mS)\\to\\Upsilon(nS)\\pi\\pi$ ($m>n, m=2,3,4,5, n=1,2,3$). It is shown that the dipion mass spectra of these decays are explained by the unified mechanism related to the contribution of the multichannel $\\pi\\pi$ scattering in the final states of these reactions. Since in the analysis the multichannel $\\pi\\pi$-scattering amplitudes did not change in comparison with the on"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1509.02049","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"}