{"paper":{"title":"$K_{e3}$ decay studies in OKA experiment","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"hep-ex","authors_text":"A.A. Khudyakov, A.M. Blik, A.M. Gorin, A.P. Filin, A.S. Konstantinov, A.S. Sadovsky, A.V. Artamonov, A.V. Inyakin, A.V. Popov, A.Yu.Polyarush, B.Zh. Zalikhanov, E.V. Guschin, G.D. Kekelidze, G.V. Khaustov, M.V. Medynsky, O.G. Tchikilev, O.P. Yushchenko, O.V. Stenyakin, S.A. Akimenko, S.A. Kholodenko, S.N. Filippov, S.V. Donskov, V.A. Duk, V.A. Lishin, V.A. Polyakov, V.A. Uvarov, V.D. Samoilenko, V.F. Kurshetsov, V.F. Obraztsov, V.I. Kravtsov, V.I. Romanovsky, V.I. Rykalin, V.K. Semenov, V.M. Leontiev, V.M. Lysan, V.N. Bychkov, V.N. Kolosov, V.S. Burtovoy, V.V. Brekhovskikh, Yu.G. Kudenko, Yu.V. Mikhailov","submitted_at":"2017-08-31T06:59:18Z","abstract_excerpt":"Recent results from OKA setup concerning form factor studies in $K_{e3}$ decay are presented. About 5.25M events are selected for the analysis. The linear and quadratic slopes for the decay formfactor $f_{+}(t)$ are measured: $\\lambda'_{+}=(26.1 \\pm 0.35 \\pm 0.28 )\\times 10^{-3}$, $\\lambda\"_{+}=(1.91 \\pm 0.19 \\pm 0.14)\\times 10^{-3}$. The scalar and tensor contributions are compatible with zero. Several alternative parametrizations are tried: the Pole fit parameter is found to be $M_V = 891 \\pm 2.0$ MeV ; the parameter of the Dispersive parametrization is measured to be $\\Lambda_+ =(24.58 \\pm "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1708.09587","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"}