{"paper":{"title":"A model to explain angular distributions of $J/\\psi$ and $\\psi(2S)$ decays into $\\Lambda\\overline{\\Lambda}$ and $\\Sigma^0\\overline{\\Sigma}^0$","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"hep-ph","authors_text":"A. Amoroso, A. Mangoni, A. Rivetti, C. Leng, D. Bettoni, F. Bianchi, F. Cossio, F. De Mori, G. Cibinetto, G. Felici, G. Mezzadri, I. Balossino, I. Garzia, J. Chai, L. Fava, L. Lavezzi, L. Yan, M. Alekseev, M. Bertani, M. Da Rocha Rolo, M. Destefanis, M. Greco, M. Maggiora, M. Savr\\`ie, P. Patteri, R. Baldini Ferroli, R. Farinelli, S. Marcello, S. Pacetti, S. Sosio, S. Spataro","submitted_at":"2018-09-12T06:44:29Z","abstract_excerpt":"BESIII data show a particular angular distribution for the decay of the $J/\\psi$ and $\\psi(2S)$ mesons into the hyperons $\\Lambda\\overline{\\Lambda}$ and $\\Sigma^0\\overline{\\Sigma}^0$. More in details the angular distribution of the decay $\\psi(2S) \\to \\Sigma^0\\overline{\\Sigma}^0$ exhibits an opposite trend with respect to that of the other three channels: $J/\\psi \\to \\Lambda\\overline{\\Lambda}$, $J/\\psi \\to \\Sigma^0\\overline{\\Sigma}^0$ and $\\psi(2S) \\to \\Lambda\\overline{\\Lambda}$. We define a model to explain the origin of this phenomenon."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1809.04273","kind":"arxiv","version":3},"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"}