{
  "id": "1205.6351",
  "version": "v2",
  "published": "2012-05-29T13:05:31.000Z",
  "updated": "2012-12-18T19:34:59.000Z",
  "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",
  "authors": [
    "Belle Collaboration",
    "R. Mizuk",
    "D. M. Asner",
    "A. Bondar",
    "T. K. Pedlar",
    "I. Adachi",
    "H. Aihara",
    "K. Arinstein",
    "V. Aulchenko",
    "T. Aushev",
    "T. Aziz",
    "A. M. Bakich",
    "A. Bay",
    "K. Belous",
    "V. Bhardwaj",
    "B. Bhuyan",
    "M. Bischofberger",
    "G. Bonvicini",
    "A. Bozek",
    "M. Bračko",
    "T. E. Browder",
    "V. Chekelian",
    "A. Chen",
    "P. Chen",
    "B. G. Cheon",
    "K. Chilikin",
    "R. Chistov",
    "I. -S. Cho",
    "K. Cho",
    "S. -K. Choi",
    "Y. Choi",
    "J. Dalseno",
    "M. Danilov",
    "Z. Doležal",
    "Z. Drásal",
    "A. Drutskoy",
    "S. Eidelman",
    "D. Epifanov",
    "J. E. Fast",
    "V. Gaur",
    "N. Gabyshev",
    "A. Garmash",
    "B. Golob",
    "J. Haba",
    "T. Hara",
    "K. Hayasaka",
    "H. Hayashii",
    "Y. Horii",
    "Y. Hoshi",
    "W. -S. Hou",
    "Y. B. Hsiung",
    "H. J. Hyun",
    "T. Iijima",
    "A. Ishikawa",
    "R. Itoh",
    "M. Iwabuchi",
    "Y. Iwasaki",
    "T. Iwashita",
    "I. Jaegle",
    "T. Julius",
    "J. H. Kang",
    "P. Kapusta",
    "T. Kawasaki",
    "H. J. Kim",
    "H. O. Kim",
    "J. H. Kim",
    "K. T. Kim",
    "M. J. Kim",
    "Y. J. Kim",
    "K. Kinoshita",
    "B. R. Ko",
    "S. Koblitz",
    "P. Kodyš",
    "S. Korpar",
    "R. T. Kouzes",
    "P. Križan",
    "P. Krokovny",
    "T. Kuhr",
    "T. Kumita",
    "A. Kuzmin",
    "Y. -J. Kwon",
    "J. S. Lange",
    "S. -H. Lee",
    "J. Li",
    "J. Libby",
    "C. Liu",
    "Y. Liu",
    "Z. Q. Liu",
    "D. Liventsev",
    "R. Louvot",
    "D. Matvienko",
    "S. McOnie",
    "K. Miyabayashi",
    "H. Miyata",
    "G. B. Mohanty",
    "D. Mohapatra",
    "A. Moll",
    "N. Muramatsu",
    "R. Mussa",
    "M. Nakao",
    "Z. Natkaniec",
    "C. Ng",
    "S. Nishida",
    "K. Nishimura",
    "O. Nitoh",
    "T. Nozaki",
    "T. Ohshima",
    "S. Okuno",
    "S. L. Olsen",
    "Y. Onuki",
    "P. Pakhlov",
    "G. Pakhlova",
    "C. W. Park",
    "H. Park",
    "R. Pestotnik",
    "M. Petrič",
    "L. E. Piilonen",
    "A. Poluektov",
    "M. Röhrken",
    "Y. Sakai",
    "S. Sandilya",
    "D. Santel",
    "T. Sanuki",
    "Y. Sato",
    "O. Schneider",
    "C. Schwanda",
    "K. Senyo",
    "O. Seon",
    "M. E. Sevior",
    "M. Shapkin",
    "C. P. Shen",
    "T. -A. Shibata",
    "J. -G. Shiu",
    "B. Shwartz",
    "A. Sibidanov",
    "F. Simon",
    "P. Smerkol",
    "Y. -S. Sohn",
    "A. Sokolov",
    "E. Solovieva",
    "S. Stanič",
    "M. Starič",
    "M. Sumihama",
    "T. Sumiyoshi",
    "K. Tanida",
    "G. Tatishvili",
    "Y. Teramoto",
    "I. Tikhomirov",
    "K. Trabelsi",
    "T. Tsuboyama",
    "M. Uchida",
    "S. Uehara",
    "T. Uglov",
    "Y. Unno",
    "S. Uno",
    "P. Vanhoefer",
    "G. Varner",
    "K. E. Varvell",
    "A. Vinokurova",
    "V. Vorobyev",
    "C. H. Wang",
    "M. -Z. Wang",
    "P. Wang",
    "X. L. Wang",
    "M. Watanabe",
    "Y. Watanabe",
    "K. M. Williams",
    "E. Won",
    "B. D. Yabsley",
    "J. Yamaoka",
    "Y. Yamashita",
    "C. Z. Yuan",
    "Z. P. Zhang",
    "V. Zhilich"
  ],
  "comment": "6 pages, 3 figures, version published in PRL",
  "categories": [
    "hep-ex"
  ],
  "abstract": "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.",
  "revisions": [
    {
      "version": "v2",
      "updated": "2012-12-18T19:34:59.000Z"
    }
  ],
  "analyses": {
    "subjects": [
      "13.25.Gv",
      "14.40.Pq",
      "12.39.Pn"
    ],
    "keywords": [
      "kekb asymmetric-energy",
      "first evidence",
      "transition",
      "first observation",
      "belle detector"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "doi": "10.1103/PhysRevLett.109.232002",
      "journal": "Physical Review Letters",
      "year": 2012,
      "month": "Dec",
      "volume": 109,
      "number": 23,
      "pages": 232002
    },
    "note": {
      "typesetting": "TeX",
      "pages": 6,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 1116415,
      "adsabs": "2012PhRvL.109w2002M"
    }
  }
}