{"paper":{"title":"Measurement of $\\Gamma(\\eta \\to \\pi^+\\pi^-\\gamma)/\\Gamma(\\eta \\to \\pi^+\\pi^-\\pi^0)$ with KLOE experiment","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"hep-ex","authors_text":"A. Antonelli, A. Budano, A. Denig, A. De Santis, A. Di Domenico, A. Kupsc, A. Passeri, A. Ranieri, A. Sciubba, as members of the KLOE-2 collaboration: D. Babusci, B. Di Micco, B. H\\\"oistad, B. Sciascia, C. Bini, C. Bloise, C. Di Donato, C. Gatti, C. Taccini, D. Badoni, D. Domenici, D. Moricciani, E. Czerwiski, E. Dan\\'e, E. De Lucia, E. Graziani, E. Iarocci, F. Archilli, F. Bossi, F. Ceradini, F. Gonnella, F. Happacher, F. Loddo, F. Nguyen, G. Bencivenni, G. Capon, G. De Robertis, G. De Zorzi, G. Fanizzi, G. Felici, G. Morello, G. Venanzoni, G. Xu, I. Balwierz, I. Prado Longhi, I. Sarra, J. Lee-Franzini, J. Zdebik, L. Tortora, M. Antonelli, M. Dreucci, M. Jacewicz, M. Martemianov, M. Martini, M. Matsyuk, M. Moulson, M. Napolitano, M. Palutan, M. Schioppa, M. Silarski, M. Wolke, O. Erriquez, P. Branchini, P. Campana, P. Ciambrone, P. De Simone, P. Franzini, P. Gauzzi, P. Massarotti, P. Moskal, P. Santangelo, R. Messi, R. Versaci, S. A. Bulychjev, S. Bocchetta, S. Fiore, S. Giovannella, S. Meola, S. Miscetti, S. Muller, T. Capussela, The KLOE Collaboration: F. Ambrosino, T. Johansson, T. Spadaro, V. Bocci, V. Kulikov, V. Patera, W. Wi\\'slicki","submitted_at":"2011-07-28T15:08:08Z","abstract_excerpt":"We report the measurement of the ratio $\\Gamma(\\eta \\to \\pi^+\\pi^-\\gamma)/\\Gamma(\\eta \\to \\pi^+\\pi^-\\pi^0)$ analyzing a large sample of $\\phi \\to \\eta \\gamma$ decays recorded with the KLOE experiment at the DA$\\Phi$NE $e^+ e^-$ collider, corresponding to an integrated luminosity of 558 pb$^{-1}$. The $\\eta \\to \\pi^+\\pi^-\\gamma$ process is supposed to proceed both via a resonant contribution, mediated by the $\\rho$ meson, and a non resonant direct term, connected to the box anomaly. The presence of the direct term affects the partial width value. Our result $R_{\\eta}=\\Gamma(\\eta \\to \\pi^+ \\pi^-"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1107.5733","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"}