{"paper":{"title":"Observation of $e^+e^- \\to \\gamma \\chi_{c1}$ and search for $e^+e^- \\to \\gamma \\chi_{c0}, \\gamma \\chi_{c2},$ and $\\gamma\\eta_c$ at $\\sqrt{s}$ near 10.6 GeV at Belle","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["hep-ph"],"primary_cat":"hep-ex","authors_text":"A. B. Kaliyar, A. Bobrov, A. Bozek, A. Chen, A. Frey, A. Garmash, A. Giri, A. Ishikawa, A. Kuzmin, A. Rostomyan, A. Sokolov, B. Bhuyan, Belle Collaboration: S. Jia, B. G. Cheon, B. G. Fulsom, B. Pal, B. Wang, C. Beleno, C. H. Li, C. H. Wang, C. Kiesling, C.-L. Hsu, C. P. Shen, C. Schwanda, C. Z. Yuan, D. Cinabro, D. Epifanov, D. Greenwald, D. Joffe, D. Kotchetkov, D. Liventsev, D. M. Asner, D. Matvienko, D. \\v{C}ervenkov, D. Y. Kim, E. Nakano, E. Prencipe, E. Solovieva, E. Waheed, E. Widmann, E. Won, F. Simon, F. Tenchini, G. Inguglia, G. Karyan, G. Pakhlova, G. Russo, G. Schnell, G. Varner, H. Aihara, H. Atmacan, H. Hayashii, H. J. Kim, H. Kichimi, H. Miyata, H. Ono, H. Yamamoto, H. Ye, I. Adachi, I. S. Lee, J. Biswal, J. B. Kim, J. E. Fast, J. F. Strube, J.-G. Shiu, J. Haba, J. H. Yin, J. Kahn, J. Libby, J. MacNaughton, J. Schueler, J. S. Lange, J. Y. Lee, K. Chilikin, K. Cho, K. E. Varvell, K. Hayasaka, K. Inami, K. J. Nath, K. Kinoshita, K. Lalwani, K. Senyo, K. Tanida, L. Cao, L. E. Piilonen, L. K. Li, L. Li Gioi, L. Santelj, M. Berger, M. Bra\\v{c}ko, M. E. Sevior, M. Gelb, M. Iwasaki, M. Lubej, M. Masuda, M. Merola, M. Nakao, M. Nayak, M. Ritter, M. Salehi, M. Stari\\v{c}, M. Takizawa, M. Uchida, M.-Z. Wang, N. Dash, N. Gabyshev, N. K. Nisar, O. Schneider, P. Behera, P. Chang, P.-C. Lu, P. Goldenzweig, P. Kody\\v{s}, P. Kri\\v{z}an, P. Krokovny, P. Urquijo, P. Wang, R. Ayad, R. Garg, R. Itoh, R. Kroeger, R. Kulasiri, R. Kumar, R. Mizuk, R. Mussa, R. Pestotnik, R. van Tonder, S. Al Said, S. B. Yang, S. Choudhury, S. C. Lee, S. Cunliffe, S. Di Carlo, S. Eidelman, S. H. Kim, S.-K. Choi, S. Korpar, S. Nishida, S. Ogawa, S. Pardi, S. Paul, S. Sandilya, S. Uehara, S. Uno, S. Watanuki, T.-A. Shibata, T. Aushev, T. Bilka, T. E. Browder, T. Ferber, T. Iijima, T. Kawasaki, T. K. Pedlar, T. Kuhr, T. Matsuda, T. Mori, T. Sanuki, T. Sumiyoshi, T. Uglov, T. V. Dong, V. Aulchenko, V. Babu, V. Bansal, V. Chekelian, V. Gaur, V. Popov, V. Savinov, V. Vorobyev, V. Zhilich, V. Zhukova, V. Zhulanov, W. Ostrowicz, W.-S. Hou, W. Sutcliffe, W. W. Jacobs, X. L. Wang, Y. B. Li, Y. Choi, Y. Iwasaki, Y. Jin, Y.-J. Kwon, Y. Onuki, Y. Sakai, Y. Seino, Y. Tao, Y. Unno, Y. Usov, Y. Yusa, Z. Dole\\v{z}al, Z. Liptak, Z. P. Zhang, Z. S. Stottler","submitted_at":"2018-10-24T11:05:42Z","abstract_excerpt":"Using data samples of 89.5~fb$^{-1}$, 711.0~fb$^{-1}$, and 121.4~fb$^{-1}$ collected with the Belle detector at the KEKB asymmetric-energy $e^+e^-$ collider at center-of-mass energies 10.52 GeV, 10.58 GeV, and 10.867 GeV, respectively, we study the exclusive reactions $e^+e^-\\to\\gamma\\chi_{cJ}$ ($J = 0,~1,~2$) and $e^+e^-\\to\\gamma\\eta_c$. A significant $\\gamma \\chi_{c1}$ signal is observed for the first time at $\\sqrt{s}=10.58$ GeV with a significance of $5.1\\sigma$ including systematic uncertainties. No significant excesses for $\\gamma \\chi_{c0}$, $\\gamma \\chi_{c2}$, and $\\gamma \\eta_c$ final"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1810.10291","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"}