https://doi.org/10.1140/epjc/s10052-007-0451-z
Regular Article - Experimental Physics
Study of charmonia in four-meson final states produced in two-photon collisions
1
Budker Institute of Nuclear Physics, Novosibirsk, Russia
2
Chiba University, Chiba, Japan
3
University of Cincinnati, Cincinnati, Ohio, 45221, USA
4
Department of Physics, Fu Jen Catholic University, Taipei, Taiwan
5
Justus-Liebig-Universität Gießen, Gießen, Germany
6
The Graduate University for Advanced Studies, Hayama, Japan
7
Gyeongsang National University, Chinju, Japan
8
Hanyang University, Seoul, Republic of Korea
9
University of Hawaii, Honolulu, Hawaii, 96822, USA
10
High Energy Accelerator Research Organization (KEK), 1-1 Oho, Tsukuba, 305-0801, Japan
11
Hiroshima Institute of Technology, Hiroshima, Japan
12
University of Illinois at Urbana-Champaign, Urbana, Illinois, 61801, USA
13
Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, P.R. China
14
Institute of High Energy Physics, Vienna, Austria
15
Institute of High Energy Physics, Protvino, Russia
16
Institute for Theoretical and Experimental Physics, Moscow, Russia
17
J. Stefan Institute, Ljubljana, Slovenia
18
Kanagawa University, Yokohama, Japan
19
Korea University, Seoul, Republic of Korea
20
Kyoto University, Kyoto, Japan
21
Kyungpook National University, Taegu, Republic of Korea
22
Swiss Federal Institute of Technology of Lausanne, EPFL, Lausanne, Switzerland
23
University of Ljubljana, Ljubljana, Slovenia
24
University of Maribor, Maribor, Slovenia
25
School of Physics, University of Melbourne, Victoria, 3010, Australia
26
Nagoya University, Nagoya, Japan
27
Nara Women’s University, Nara, Japan
28
National Central University, Chung-li, Taiwan
29
National United University, Miao Li, Taiwan
30
Department of Physics, National Taiwan University, Taipei, Taiwan
31
H. Niewodniczanski Institute of Nuclear Physics, Krakow, Poland
32
Nippon Dental University, Niigata, Japan
33
Niigata University, Niigata, Japan
34
University of Nova Gorica, Nova Gorica, Slovenia
35
Osaka City University, Osaka, Japan
36
Osaka University, Osaka, Japan
37
Panjab University, Chandigarh, India
38
Peking University, Beijing, P.R. China
39
University of Pittsburgh, Pittsburgh, Pennsylvania, 15260, USA
40
Princeton University, Princeton, New Jersey, 08544, USA
41
RIKEN BNL Research Center, Upton, New York, 11973, USA
42
Saga University, Saga, Japan
43
University of Science and Technology of China, Hefei, P.R. China
44
Seoul National University, Seoul, Republic of Korea
45
Shinshu University, Nagano, Japan
46
Sungkyunkwan University, Suwon, Republic of Korea
47
University of Sydney, Sydney, New South Wales, Australia
48
Tata Institute of Fundamental Research, Mumbai, India
49
Toho University, Funabashi, Japan
50
Tohoku Gakuin University, Tagajo, Japan
51
Tohoku University, Sendai, Japan
52
Department of Physics, University of Tokyo, Tokyo, Japan
53
Tokyo Institute of Technology, Tokyo, Japan
54
Tokyo Metropolitan University, Tokyo, Japan
55
Tokyo University of Agriculture and Technology, Tokyo, Japan
56
Toyama National College of Maritime Technology, Toyama, Japan
57
Virginia Polytechnic Institute and State University, Blacksburg, Virginia, 24061, USA
58
Yonsei University, Seoul, Republic of Korea
* e-mail: uehara@post.kek.jp
Received:
27
June
2007
Revised:
18
September
2007
Published online:
6
November
2007
We report measurements of charmonia produced in two-photon collisions and decaying to four-meson final states, where the meson is either a charged pion or a charged kaon. The analysis is based on a 395 fb-1 data sample accumulated with the Belle detector at the KEKB electron–positron collider. We observe signals for the three C-even charmonia ηc(1S), χc0(1P) and χc2(1P) in the π+π-π+π-, K+K-π+π- and K+K-K+K- decay modes. No clear signals for ηc(2S) production are found in these decay modes. We have also studied resonant structures in charmonium decays to two-body intermediate meson resonances. We report the products of the two-photon decay width and the branching fractions, , for each of the charmonium decay modes.
© Springer-Verlag / Società Italiana di Fisica, 2008