{"paper":{"title":"Limit on the production of a new vector boson in $\\mathrm{e^+ e^-}\\rightarrow {\\rm U}\\gamma$, U$\\rightarrow \\pi^+\\pi^-$ with the KLOE experiment","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"hep-ex","authors_text":"A. Budano, A. De Santis, A. Di Cicco, A. Di Domenico, A. d'Uffizi, A. Fantini, A. Gajos, A. Kupsc, A. Palladino, A. Passeri, A. Ranieri, B. Cao, C. Bloise, D. Babusci, D. Domenici, D. Kami\\'nska, D. Moricciani, E. Czerwi\\`nski, E. Dan\\`e, E. De Lucia, E. Graziani, E. Perez del Rio, F. Bossi, F. Ceradini, F. Curciarello, F. Happacher, F. Sirghi, G. Bencivenni, G. D'Agostini, G. Felici, G. Giardina, G. Mandaglio, G. Morello, G. Venanzoni, I. Sarra, KLOE-2 Collaboration: A. Anastasi, L. Caldeira Balkest{\\aa}hl, L. Heijkenskj\\\"old, L. Tortora, M. Berlowski, M. Martini, M. Mascolo, M. Papenbrock, M. Schioppa, M. Silarski, M. Wolke, P. Branchini, P. Ciambrone, P. De Simone, P. Gauzzi, P. Moskal, P. Santangelo, R. Di Salvo, R. Messi, S. Fiore, S. Giovannella, S. Loffredo, S. Miscetti, T. Johansson, V. De Leo, V. Patera, W. Ikegami Andersson, W. Krzemien, W. Wi\\'slicki","submitted_at":"2016-03-19T12:14:40Z","abstract_excerpt":"The recent interest in a light gauge boson in the framework of an extra U(1) symmetry motivates searches in the mass range below 1 GeV.\n  We present a search for such a particle, the dark photon, in ${\\rm e^+ e^-}\\rightarrow {\\rm U}\\gamma$, U$\\rightarrow \\pi^+\\pi^-$ based on 28 million $\\mathrm{e^+ e^-} \\rightarrow \\pi^+ \\pi^-\\gamma$ events collected at DA$\\Phi$NE by the KLOE experiment. The $\\pi^+ \\pi^-$ production by initial-state radiation compensates for a loss of sensitivity of previous KLOE ${\\rm U} \\rightarrow \\mathrm{e^+ e^-}$, $\\mu^+\\mu^-$ searches due to the small branching ratios in"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1603.06086","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"}