{"paper":{"title":"Observation of \\psi(4040) and \\psi(4160) decay into \\eta J/\\psi","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"hep-ex","authors_text":"A. Bozek, A. Ishikawa, A. M. Bakich, A. Moll, A. Sibidanov, A. Zupanc, B. Bhuyan, Belle Collaboration: X. L. Wang, B. G. Cheon, B. Golob, B. R. Ko, C. C. Zhang, C. H. Wang, C. Liu, C. P. Shen, C. Schwanda, C. Z. Yuan, D. M. Asner, D. Santel, E. Solovieva, E. Won, F. Simon, G. B. Mohanty, G. Bonvicini, G. Pakhlova, G. Tatishvili, G. Varner, H. Aihara, H. Farhat, H. Hayashii, H. J. Hyun, H. J. Kim, H. Miyata, H. O. Kim, H. Park, H. Sahoo, I. Adachi, J. B. Kim, J. Brodzicka, J. Dalseno, J. E. Fast, J.-G. Shiu, J. H. Kang, J. H. Kim, J. Klucar, J. Li, J. Libby, J. S. Lange, J. Wang, K. Cho, K. Inami, K. Kinoshita, K. M. Williams, K. Prothmann, K. Senyo, K. Tanida, K. Trabelsi, L. E. Piilonen, M. Bracko, M. E. Sevior, M. Iwabuchi, M. J. Kim, M. Nakao, M. Petric, M. Shapkin, M. Staric, M. Uchida, M.-Z. Wang, N. Muramatsu, O. Brovchenko, O. Nitoh, O. Schneider, P. Chen, P. Kapusta, P. Kodys, P. Krizan, P. Krokovny, P. Lukin, P. Smerkol, P. Vanhoefer, P. Wang, R. Gillard, R. Mizuk, R. Mussa, R. Pestotnik, R. T. Kouzes, S. Eidelman, S. Esen, S.-H. Lee, S.-K. Choi, S. L. Olsen, S. McOnie, S. Nishida, S. Ogawa, S. Okuno, S. Sandilya, S. Stanic, S. Uehara, S. Uno, T.-A. Shibata, T. Aushev, T. Aziz, T. E. Browder, T. K. Pedlar, T. Kumita, T. Ohshima, T. Sanuki, T. Sumiyoshi, V. Aulchenko, V. Gaur, V. Zhilich, W.-S. Hou, Y. Ban, Y. Choi, Y. Hoshi, Y. J. Kim, Y. L. Han, Y. M. Goh, Y. Sakai, Y.-S. Sohn, Y. Teramoto, Y. Unno, Y. Usov, Y. Yamashita, Z. Dolezal, Z. Dr\\'asal, Z. P. Zhang, Z. Q. Liu","submitted_at":"2012-10-29T03:20:28Z","abstract_excerpt":"The cross section for e^+e^- \\to \\eta J/\\psi between \\sqrt{s}=3.8 GeV/c^2 and 5.3 GeV/c^2 is measured via initial state radiation using 980 fb^{-1} of data on and around the \\Upsilon(nS)(n=1,2,3,4,5) resonances collected with the Belle detector at KEKB. Two resonant structures at the \\psi(4040) and \\psi(4160) are observed in the \\eta J/\\psi invariant mass distribution. Fitting the mass spectrum with the coherent sum of two Breit-Wigner functions, one obtains BR(\\psi(4040)\\to\\eta J/\\psi)\\cdot\\Gamma_{ee}^{\\psi(4040)} = (4.8\\pm0.9\\pm1.4) eV and BR(\\psi(4160)\\to\\eta J/\\psi)\\cdot\\Gamma_{ee}^{\\psi(4"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1210.7550","kind":"arxiv","version":2},"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"}