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Phys Rev Lett. 2016 Sep 30;117(14):142001. Epub 2016 Sep 28.

Energy Scan of the e^{+}e^{-}→h_{b}(nP)π^{+}π^{-} (n=1, 2) Cross Sections and Evidence for ϒ(11020) Decays into Charged Bottomoniumlike States.

Mizuk R1,2,3, Bondar A4,5, Adachi I6,7, Aihara H8, Asner DM9, Atmacan H10, Aulchenko V4,5, Aushev T3, Ayad R11, Badhrees I12,11, Bakich AM13, Barberio E14, Behera P15, Bhardwaj V16, Bhuyan B17, Biswal J18, Bobrov A4,5, Bonvicini G19, Bozek A20, Bračko M18,21, Browder TE22, Červenkov D23, Chekelian V24, Chen A25, Cheon BG26, Chilikin K1,2, Chistov R1,2, Chobanova V24, Choi SK27, Choi Y28, Cinabro D19, Dalseno J24,29, Danilov M1,2, Dash N30, Doležal Z23, Drutskoy A1,2, Eidelman S4,5, Epifanov D8, Ferber T31, Fulsom BG9, Gaur V32, Garmash A4,5, Gillard R19, Goh YM26, Goldenzweig P33, Golob B18,34, Greenwald D35, Hara T6,7, Hayasaka K36, Hayashii H37, Hou WS38, Hsu CL14, Inami K39, Inguglia G31, Ishikawa A40, Iwasaki Y7, Jaegle I22, Julius T14, Kang KH41, Katrenko P1,3, Kim DY42, Kim HJ41, Kim JB43, Kim KT43, Kim MJ41, Kim SH26, Kim YJ44, Kinoshita K45, Kodyš P23, Korpar S18,21, Kotchetkov D22, Krokovny P4,5, Kuhr T46, Kuzmin A4,5, Kwon YJ47, Lange JS48, Li CH14, Li H49, Li L50, Li Gioi L24, Libby J15, Liventsev D7,51, Lubej M18, Luo T52, Masuda M53, Matsuda T54, Matvienko D4,5, Miyabayashi K37, Miyata H55, Mohanty GB32, Moll A24,29, Nakano E56, Nakao M6,7, Nanut T18, Nath KJ17, Negishi K40, Niiyama M57, Nisar NK58,32, Nishida S6,7, Ogawa S59, Okuno S60, Olsen SL61, Onuki Y8, Pakhlov P1,2, Pakhlova G1,3, Pal B45, Park CW28, Park H41, Paul S35, Pedlar TK62, Pestotnik R18, Petrič M18, Piilonen LE51, Pulvermacher C33, Ritter M46, Sakai Y6,7, Sandilya S45, Sanuki T40, Savinov V52, Schlüter T46, Schneider O63, Schnell G64,65, Schwanda C66, Seino Y55, Semmler D48, Senyo K67, Seon O39, Sevior ME14, Shebalin V4,5, Shibata TA68, Shiu JG38, Shwartz B4,5, Simon F24,29, Solovieva E1,3, Starič M18, Stypula J20, Sumiyoshi T69, Takizawa M70, Tamponi U71,72, Tanida K61, Teramoto Y56, Tikhomirov I2, Trabelsi K6,7, Uchida M68, Uglov T1,3, Unno Y26, Uno S6,7, Urquijo P14, Usov Y4,5, Van Hulse C64, Varner G22, Vorobyev V4,5, Wang CH73, Wang MZ38, Wang P74, Wang XL51, Watanabe Y60, Williams KM51, Won E43, Yamaoka J9, Yamashita Y75, Yelton J76, Yuan CZ74, Zhang ZP50, Zhilich V4,5, Zhukova V2, Zhulanov V4,5, Zupanc A18,34; Belle Collaboration.

Author information

1
P. N. Lebedev Physical Institute of the Russian Academy of Sciences, Moscow 119991.
2
Moscow Physical Engineering Institute, Moscow 115409.
3
Moscow Institute of Physics and Technology, Moscow Region 141700.
4
Budker Institute of Nuclear Physics SB RAS, Novosibirsk 630090.
5
Novosibirsk State University, Novosibirsk 630090.
6
SOKENDAI (The Graduate University for Advanced Studies), Hayama 240-0193.
7
High Energy Accelerator Research Organization (KEK), Tsukuba 305-0801.
8
Department of Physics, University of Tokyo, Tokyo 113-0033.
9
Pacific Northwest National Laboratory, Richland, Washington 99352.
10
Middle East Technical University, 06531 Ankara.
11
Department of Physics, Faculty of Science, University of Tabuk, Tabuk 71451.
12
King Abdulaziz City for Science and Technology, Riyadh 11442.
13
School of Physics, University of Sydney, New South Wales 2006.
14
School of Physics, University of Melbourne, Victoria 3010.
15
Indian Institute of Technology, Madras, Chennai 600036.
16
University of South Carolina, Columbia, South Carolina 29208.
17
Indian Institute of Technology, Guwahati, Assam 781039.
18
J. Stefan Institute, 1000 Ljubljana.
19
Wayne State University, Detroit, Michigan 48202.
20
H. Niewodniczanski Institute of Nuclear Physics, Krakow 31-342.
21
University of Maribor, 2000 Maribor.
22
University of Hawaii, Honolulu, Hawaii 96822.
23
Faculty of Mathematics and Physics, Charles University, 121 16 Prague.
24
Max-Planck-Institut für Physik, 80805 München.
25
National Central University, Chung-li 32054.
26
Hanyang University, Seoul 133-791.
27
Gyeongsang National University, Chinju 660-701.
28
Sungkyunkwan University, Suwon 440-746.
29
Excellence Cluster Universe, Technische Universität München, 85748 Garching.
30
Indian Institute of Technology, Bhubaneswar, Satya Nagar 751007.
31
Deutsches Elektronen-Synchrotron, 22607 Hamburg.
32
Tata Institute of Fundamental Research, Mumbai 400005.
33
Institut für Experimentelle Kernphysik, Karlsruher Institut für Technologie, 76131 Karlsruhe.
34
Faculty of Mathematics and Physics, University of Ljubljana, 1000 Ljubljana.
35
Department of Physics, Technische Universität München, 85748 Garching.
36
Kobayashi-Maskawa Institute, Nagoya University, Nagoya 464-8602.
37
Nara Women's University, Nara 630-8506.
38
Department of Physics, National Taiwan University, Taipei 10617.
39
Graduate School of Science, Nagoya University, Nagoya 464-8602.
40
Department of Physics, Tohoku University, Sendai 980-8578.
41
Kyungpook National University, Daegu 702-701.
42
Soongsil University, Seoul 156-743.
43
Korea University, Seoul 136-713.
44
Korea Institute of Science and Technology Information, Daejeon 305-806.
45
University of Cincinnati, Cincinnati, Ohio 45221.
46
Ludwig Maximilians University, 80539 Munich.
47
Yonsei University, Seoul 120-749.
48
Justus-Liebig-Universität Gießen, 35392 Gießen.
49
Indiana University, Bloomington, Indiana 47408.
50
University of Science and Technology of China, Hefei 230026.
51
Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061.
52
University of Pittsburgh, Pittsburgh, Pennsylvania 15260.
53
Earthquake Research Institute, University of Tokyo, Tokyo 113-0032.
54
University of Miyazaki, Miyazaki 889-2192.
55
Niigata University, Niigata 950-2181.
56
Osaka City University, Osaka 558-8585.
57
Kyoto University, Kyoto 606-8502.
58
Aligarh Muslim University, Aligarh 202002.
59
Toho University, Funabashi 274-8510.
60
Kanagawa University, Yokohama 221-8686.
61
Seoul National University, Seoul 151-742.
62
Luther College, Decorah, Iowa 52101.
63
École Polytechnique Fédérale de Lausanne (EPFL), Lausanne 1015.
64
University of the Basque Country UPV/EHU, 48080 Bilbao.
65
IKERBASQUE, Basque Foundation for Science, 48013 Bilbao.
66
Institute of High Energy Physics, Vienna 1050.
67
Yamagata University, Yamagata 990-8560.
68
Tokyo Institute of Technology, Tokyo 152-8550.
69
Tokyo Metropolitan University, Tokyo 192-0397.
70
Showa Pharmaceutical University, Tokyo 194-8543.
71
INFN-Sezione di Torino, 10125 Torino.
72
University of Torino, 10124 Torino.
73
National United University, Miao Li 36003.
74
Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049.
75
Nippon Dental University, Niigata 951-8580.
76
University of Florida, Gainesville, Florida 32611.

Abstract

Using data collected with the Belle detector at the KEKB asymmetric-energy e^{+}e^{-} collider, we measure the energy dependence of the e^{+}e^{-}→h_{b}(nP)π^{+}π^{-} (n=1, 2) cross sections from thresholds up to 11.02 GeV. We find clear ϒ(10860) and ϒ(11020) peaks with little or no continuum contribution. We study the resonant substructure of the ϒ(11020)→h_{b}(nP)π^{+}π^{-} transitions and find evidence that they proceed entirely via the intermediate isovector states Z_{b}(10610) and Z_{b}(10650). The relative fraction of these states is loosely constrained by the current data: The hypothesis that only Z_{b}(10610) is produced is excluded at the level of 3.3 standard deviations, while the hypothesis that only Z_{b}(10650) is produced is not excluded at a significant level.

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