{"paper":{"title":"Evidence for the eta_b(2S) and observation of h_b(1P) -> eta_b(1S) gamma and h_b(2P) -> eta_b(1S) gamma","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"hep-ex","authors_text":"A. Bay, A. Bondar, A. Bozek, A. Chen, A. Drutskoy, A. Garmash, A. Ishikawa, A. Kuzmin, A. M. Bakich, A. Moll, A. Poluektov, A. Sibidanov, A. Sokolov, A. Vinokurova, B. Bhuyan, B. D. Yabsley, Belle Collaboration: R. Mizuk, B. G. Cheon, B. Golob, B. R. Ko, B. Shwartz, C. H. Wang, C. Liu, C. Ng, C. P. Shen, C. Schwanda, C. W. Park, C. Z. Yuan, D. Epifanov, D. Liventsev, D. M. Asner, D. Matvienko, D. Mohapatra, D. Santel, E. Solovieva, E. Won, F. Simon, G. B. Mohanty, G. Bonvicini, G. Pakhlova, G. Tatishvili, G. Varner, H. Aihara, H. Hayashii, H. J. Hyun, H. J. Kim, H. Miyata, H. O. Kim, H. Park, I. Adachi, I. Jaegle, I. -S. Cho, I. Tikhomirov, J. Dalseno, J. E. Fast, J. -G. Shiu, J. Haba, J. H. Kang, J. H. Kim, J. Li, J. Libby, J. S. Lange, J. Yamaoka, K. Arinstein, K. Belous, K. Chilikin, K. Cho, K. E. Varvell, K. Hayasaka, K. Kinoshita, K. Miyabayashi, K. M. Williams, K. Nishimura, K. Senyo, K. Tanida, K. T. Kim, K. Trabelsi, L. E. Piilonen, M. Bischofberger, M. Bra\\v{c}ko, M. Danilov, M. E. Sevior, M. Iwabuchi, M. J. Kim, M. Nakao, M. Petri\\v{c}, M. R\\\"ohrken, M. Shapkin, M. Stari\\v{c}, M. Sumihama, M. Uchida, M. Watanabe, M. -Z. Wang, N. Gabyshev, N. Muramatsu, O. Nitoh, O. Schneider, O. Seon, P. Chen, P. Kapusta, P. Kody\\v{s}, P. Kri\\v{z}an, P. Krokovny, P. Pakhlov, P. Smerkol, P. Vanhoefer, P. Wang, R. Chistov, R. Itoh, R. Louvot, R. Mussa, R. Pestotnik, R. T. Kouzes, S. Eidelman, S. -H. Lee, S. -K. Choi, S. Koblitz, S. Korpar, S. L. Olsen, S. McOnie, S. Nishida, S. Okuno, S. Sandilya, S. Stani\\v{c}, S. Uehara, S. Uno, T. -A. Shibata, T. Aushev, T. Aziz, T. E. Browder, T. Hara, T. Iijima, T. Iwashita, T. Julius, T. Kawasaki, T. K. Pedlar, T. Kuhr, T. Kumita, T. Nozaki, T. Ohshima, T. Sanuki, T. Sumiyoshi, T. Tsuboyama, T. Uglov, V. Aulchenko, V. Bhardwaj, V. Chekelian, V. Gaur, V. Vorobyev, V. Zhilich, W. -S. Hou, X. L. Wang, Y. B. Hsiung, Y. Choi, Y. Horii, Y. Hoshi, Y. Iwasaki, Y. J. Kim, Y. -J. Kwon, Y. Liu, Y. Onuki, Y. Sakai, Y. Sato, Y. -S. Sohn, Y. Teramoto, Y. Unno, Y. Watanabe, Y. Yamashita, Z. Dole\\v{z}al, Z. Dr\\'asal, Z. Natkaniec, Z. P. Zhang, Z. Q. Liu","submitted_at":"2012-05-29T13:05:31Z","abstract_excerpt":"We report the first evidence for the eta_b(2S) using the h_b(2P)->eta_b(2S)gamma transition and the first observation of the h_b(1P)->eta_b(1S)gamma and h_b(2P)->eta_b(1S)gamma transitions. The mass and width of the eta_b(1S) and eta_b(2S) are measured to be m_etab(1S)=(9402.4+-1.5+-1.8)MeV/c^2, m_etab(2S)=(9999.0+-3.5 +2.8-1.9)MeV/c^2 and Gamma_etab(1S)=(10.8 +4.0-3.7 +4.5-2.0)MeV. We also update the h_b(1P) and h_b(2P) mass measurements. We use a 133.4/fb data sample collected at energies near the Upsilon(5S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1205.6351","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"}