{"paper":{"title":"Wide acceptance measurement of the K$^-$/K$^+$ ratio from Ni+Ni collisions at 1.91A GeV","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"nucl-ex","authors_text":"A. Andronic, A. Lebedev, A. Le F\\`evre, A. Mangiarotti, A. Reischl, A. Sch\\\"uttauf, A. Zhilin, B. Hong, B. Sikora, D. Pelte, E. Cordier, E. Widmann, F. Rami, G. Stoicea, H.S. Xu, I. Deppner, I. Ga\\v{s}pari\\'c, I. Weber, I. Yushmanov, J. Kecskemeti, J.L. Liu, J. Marton, J. Zmeskal, K.D. Hildenbrand, K. Piasecki, K. Siwek-Wilczy\\'nska, K.S. Sim, K. Suzuki, K. Wi\\'sniewski, L. Fabbietti, M. Berger, M. Cargnelli, M. D\\v{z}elalija, M. Kirejczyk, M. Ki\\v{s}, M. Korolija, M.L. Benabderrahmane, M. Merschmeyer, M. Petrovici, M.S. Ryu, N. Bastid, N. Herrmann, O. Czerwiakowa, O.N. Hartmann, P. Buehler, P. Crochet, P. Dupieux, P. Gasik, P. Koczon, P. Schmidt, P. Wagner, R. Averbeck, R. Kotte, R. M\\\"unzer, R. \\v{C}aplar, T.I. Kang, T. Matulewicz, V. Barret, V. Manko, V. Simion, V. Smolyankin, V. Zinyuk, W. Reisdorf, X. Lopez, Y. Grishkin, Y.J. Kim, Y. Leifels, Y. Zhang, Z. Basrak, Z. Fodor, Z.G. Xiao, Z. Seres, Z. Tymi\\'nski","submitted_at":"2018-07-02T10:09:26Z","abstract_excerpt":"The FOPI Collaboration at the GSI SIS-18 synchrotron measured charged kaons from central and semi-central collisions of Ni+Ni at a beam energy of 1.91A GeV. We present the distribution of the K$^-$\\K$^+$ ratio on the energy vs polar angle plane in the nucleon-nucleon center-of-mass frame, with and without subtraction of the contribution of $\\phi$(1020) meson decays to the K$^-$ yield. The acceptance of the current experiment is substantially wider compared to the previous measurement of the same colliding system. The ratio of K$^-$ to K$^+$ energy spectra is expected to be sensitive to the in-"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1807.00576","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"}