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Observation of an enhancement in e⁺e^-→Υ(1S) πn⁺n^-→Υ(2S)n⁺n^- and (3S)n⁺n^- production near s = 10.89 GeV

Physical Review D - Particles, Fields, Gravitation and Cosmology, Volume 82, No. 9, Article 091106, Year 2010

We measure the production cross sections for e+e -→Υ(1S)π+π-, Υ(2S)π+π-, and Υ(3S) π+π- as a function of √s between 10.83 GeV and 11.02 GeV. The data consist of 8.1fb-1 collected with the Belle detector at the KEKB e+e- collider. We observe enhanced production in all three final states that does not agree well with the conventional Υ(10860) line shape. A fit using a Breit-Wigner resonance shape yields a peak mass of [10888.4-2.6+2.7(stat)±1.2(syst)]MeV/c2 and a width of [30.7-7.0+8.3(stat)±3.1(syst)]MeV/c2. © 2010 The American Physical Society.

Chen, K. F.
1. Taiwan, Taipei National Taiwan University
Hou, Weishu
1. Taiwan, Taipei National Taiwan University
Adachi, Ichiro
1. Japan, Tsukuba High Energy Accelerator Research Organization, Tsukuba
Aihara, Hiroaki
1. Japan, Tokyo The University of Tokyo
Aushev, Tagir A.Kh
1. Russian Federation, Moscow Alikhanov Institute for Theoretical and Experimental Physics
2. Switzerland, Lausanne École Polytechnique Fédérale de Lausanne
Bakich, A. M.
1. Australia, Sydney The University of Sydney
Balagura, Vladislav
1. Russian Federation, Moscow Alikhanov Institute for Theoretical and Experimental Physics
Bay, Aurelio
1. Switzerland, Lausanne École Polytechnique Fédérale de Lausanne
Belous, K. S.
1. Russian Federation, Protvino Institut Fiziki Vysokikh Energii
Bhardwaj, Vishal N.
1. India, Chandigarh Panjab University
Bischofberger, Markus
1. Japan, Nara Nara Women's University
Bondar, A. E.
1. Russian Federation, Novosibirsk Budker Institute of Nuclear Physics of the Siberian Branch of the Ras
2. Russian Federation, Novosibirsk Novosibirsk State University
Bozek, A. S.
1. Poland, Krakow Henryk Niewodniczanski Institute of Nuclear Physics of the Polish Academy of Sciences
Bračko, Marko
1. Slovenia, Ljubljana Institut Jožef Stefan
2. Slovenia, Maribor Univerza V Mariboru
Brodzicka, J.
1. Poland, Krakow Henryk Niewodniczanski Institute of Nuclear Physics of the Polish Academy of Sciences
Browder, Thomas E.
1. United States, Honolulu University of Hawaiʻi at Mānoa
Chang, Mingchuan
1. Taiwan, New Taipei City Fu Jen Catholic University
Chang, P.
1. Taiwan, Taipei National Taiwan University
Chao, Y.
1. Taiwan, Taipei National Taiwan University
Chen, Augustine Ei Fong
1. Taiwan, Taoyuan National Central University
Chen, P.
1. Taiwan, Taipei National Taiwan University
Cheon, Byunggu
1. South Korea, Seoul Hanyang University
Chiang, C. C.
1. Taiwan, Taipei National Taiwan University
Chistov, Ruslan N.
1. Russian Federation, Moscow Alikhanov Institute for Theoretical and Experimental Physics
Cho, I. S.
1. South Korea, Seoul Yonsei University
Choi, Yeong K.
1. South Korea, Seoul Sungkyunkwan University
Dalseno, J.
1. Germany, Munich Max Planck Institute for Physics Werner Heisenberg Institute
2. Germany, Garching Bei Munchen Exzellenzcluster Origins
Drutskoy, Alexey G.
1. United States, Cincinnati University of Cincinnati
Eidelman, Simon I.
1. Russian Federation, Novosibirsk Budker Institute of Nuclear Physics of the Siberian Branch of the Ras
2. Russian Federation, Novosibirsk Novosibirsk State University
Epifanov, Denis A.
1. Russian Federation, Novosibirsk Budker Institute of Nuclear Physics of the Siberian Branch of the Ras
2. Russian Federation, Novosibirsk Novosibirsk State University
Gabyshev, Nikolay I.
1. Russian Federation, Novosibirsk Budker Institute of Nuclear Physics of the Siberian Branch of the Ras
2. Russian Federation, Novosibirsk Novosibirsk State University
Goldenzweig, Pablo
1. United States, Cincinnati University of Cincinnati
Ha, H.
1. South Korea, Seoul Korea University
Han, B. Y.
1. South Korea, Seoul Korea University
Hayasaka, Kiyoshi
1. Japan, Nagoya Nagoya University
Hayashii, Hisaki
1. Japan, Nara Nara Women's University
Hazumi, Masashi
1. Japan, Tsukuba High Energy Accelerator Research Organization, Tsukuba
Hoshi, Yoshimoto
1. Nigeria Tohoku Gakuin University
Hsiung, Y. B.
1. Taiwan, Taipei National Taiwan University
Hyun, H. J.
1. South Korea, Daegu Kyungpook National University
Iijima, Toru
1. Japan, Nagoya Nagoya University
Inami, Kenji
1. Japan, Nagoya Nagoya University
Itoh, Ryousuke
1. Japan, Tsukuba High Energy Accelerator Research Organization, Tsukuba
Iwabuchi, M.
1. South Korea, Seoul Yonsei University
Iwasaki, Yoshihito
1. Japan, Tsukuba High Energy Accelerator Research Organization, Tsukuba
Julius, T. Danger
1. Australia, Melbourne University of Melbourne
Kah, D. H.
1. South Korea, Daegu Kyungpook National University
Kang, Ju-hwan
1. South Korea, Seoul Yonsei University
Katayama, Nobuhiko
1. Japan, Tsukuba High Energy Accelerator Research Organization, Tsukuba
Kíesling, Christian M.
1. Germany, Munich Max Planck Institute for Physics Werner Heisenberg Institute
Kim, H. O.
1. South Korea, Daegu Kyungpook National University
Kim, Y. I.
1. South Korea, Daegu Kyungpook National University
Kim, Youngjun
1. Japan, Hayama The Graduate University for Advanced Studies
Kinoshita, Kay
1. United States, Cincinnati University of Cincinnati
Ko, Byeong Rok
1. South Korea, Seoul Korea University
Korpar, Sarno
1. Slovenia, Ljubljana Institut Jožef Stefan
2. Slovenia, Maribor Univerza V Mariboru
Kriaan, P.
1. Slovenia, Ljubljana Institut Jožef Stefan
2. Slovenia, Ljubljana Univerza V Ljubljani
Krokovny, P. P.
1. Japan, Tsukuba High Energy Accelerator Research Organization, Tsukuba
Kwon, Y.
1. South Korea, Seoul Yonsei University
Kyeong, S. H.
1. South Korea, Seoul Yonsei University
Lange, Jens Sören
1. Germany, Giessen Justus-liebig-universität Gießen
Lee, S. H.
1. South Korea, Seoul Korea University
Li, J.
1. United States, Honolulu University of Hawaiʻi at Mānoa
Liu, Chengming
1. China, Hefei University of Science and Technology of China
Liu, Yong
1. Japan, Nagoya Nagoya University
Liventsev, Dmitri
1. Russian Federation, Moscow Alikhanov Institute for Theoretical and Experimental Physics
Louvot, R.
1. Switzerland, Lausanne École Polytechnique Fédérale de Lausanne
MacNaughton, Jimmy N.
1. Japan, Tsukuba High Energy Accelerator Research Organization, Tsukuba
Matyja, Adam Tomasz
1. Poland, Krakow Henryk Niewodniczanski Institute of Nuclear Physics of the Polish Academy of Sciences
McOnie, S.
1. Australia, Sydney The University of Sydney
Miyabayashi, Kenkichi
1. Japan, Nara Nara Women's University
Miyata, Hitoshi
1. Japan, Niigata Niigata University
Miyazaki, Y.
1. Japan, Nagoya Nagoya University
Mizuk, Roman V.
1. Russian Federation, Moscow Alikhanov Institute for Theoretical and Experimental Physics
Nagasaka, Yasushi
1. Japan, Hiroshima Hiroshima Institute of Technology
Nakano, Eiichi
1. Japan, Osaka Osaka Metropolitan University
Nakao, Mitsutaka
1. Japan, Tsukuba High Energy Accelerator Research Organization, Tsukuba
Nishida, S.
1. Japan, Tsukuba High Energy Accelerator Research Organization, Tsukuba
Nishimura, K.
1. United States, Honolulu University of Hawaiʻi at Mānoa
Nitoh, O.
1. Japan, Fuchu Tokyo University of Agriculture and Technology
Nozaki, T.
1. Japan, Tsukuba High Energy Accelerator Research Organization, Tsukuba
Ogawa, Satoru
1. Japan, Tokyo Toho University
Ohshima, T.
1. Japan, Nagoya Nagoya University
Okuno, S.
1. Japan, Yokohama Kanagawa University
Pakhlova, G.
1. Russian Federation, Moscow Alikhanov Institute for Theoretical and Experimental Physics
Park, Hwanbae Kyu
1. South Korea, Daegu Kyungpook National University
Park, H. K.
1. South Korea, Daegu Kyungpook National University
Pestotnik, Rok
1. Slovenia, Ljubljana Institut Jožef Stefan
Petrič, M.
1. Slovenia, Ljubljana Institut Jožef Stefan
Piilonen, L. E.
1. United States, Blacksburg Virginia Polytechnic Institute and State University
Ryu, S.
1. South Korea, Seoul Seoul National University
Sahoo, H.
1. United States, Honolulu University of Hawaiʻi at Mānoa
Sakai, K.
1. Japan, Niigata Niigata University
Sakai, Y.
1. Japan, Tsukuba High Energy Accelerator Research Organization, Tsukuba
Schneider, Olivier
1. Switzerland, Lausanne École Polytechnique Fédérale de Lausanne
Schwanda, C.
1. Austria, Vienna Institut Fur Hochenergiephysik
Schwartz, A. J.
1. United States, Cincinnati University of Cincinnati
Seidl, R.
1. United States, Upton Riken Bnl Research Center
Senyo, K.
1. Japan, Nagoya Nagoya University
Shapkin, M.
1. Russian Federation, Protvino Institut Fiziki Vysokikh Energii

AFRICAN RESEARCH NEXUS

Observation of an enhancement in e⁺e^-→Υ(1S) πn⁺n^-→Υ(2S)n⁺n^- and (3S)n⁺n^- production near s = 10.89 GeV

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African Research Nexus

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AFRICAN RESEARCH NEXUS

Observation of an enhancement in e+e-→Υ(1S) πn+n-→Υ(2S)n+n- and (3S)n+n- production near s = 10.89 GeV

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African Research Nexus

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Observation of an enhancement in e⁺e^-→Υ(1S) πn⁺n^-→Υ(2S)n⁺n^- and (3S)n⁺n^- production near s = 10.89 GeV