Observation of e+e-→K+K-J/ψ via initial-state radiation at Belle

C. Z. Yuan, C. P. Shen, P. Wang, X. L. Wang, I. Adachi, H. Aihara, K. Arinstein, V. Aulchenko, T. Aushev, A. M. Bakich, V. Balagura, E. Barberio, K. Belous, U. Bitenc, A. Bondar, M. Bračko, J. Brodzicka, T. E. Browder, Y. Chao, A. ChenW. T. Chen, B. G. Cheon, R. Chistov, I. S. Cho, Y. Choi, J. Dalseno, M. Danilov, A. Das, M. Dash, S. Eidelman, D. Epifanov, N. Gabyshev, B. Golob, H. Ha, J. Haba, K. Hayasaka, M. Hazumi, D. Heffernan, T. Hokuue, Y. Hoshi, W. S. Hou, H. J. Hyun, K. Inami, A. Ishikawa, H. Ishino, R. Itoh, Y. Iwasaki, D. H. Kah, J. H. Kang, H. Kawai, T. Kawasaki, H. Kichimi, Y. J. Kim, K. Kinoshita, S. Korpar, P. Križan, P. Krokovny, R. Kumar, C. C. Kuo, A. Kuzmin, Y. J. Kwon, M. J. Lee, S. E. Lee, T. Lesiak, S. W. Lin, D. Liventsev, F. Mandl, A. Matyja, S. McOnie, T. Medvedeva, W. Mitaroff, K. Miyabayashi, H. Miyake, H. Miyata, Y. Miyazaki, R. Mizuk, D. Mohapatra, G. R. Moloney, Y. Nagasaka, M. Nakao, S. Nishida, O. Nitoh, S. Noguchi, T. Nozaki, S. Ogawa, T. Ohshima, S. Okuno, S. L. Olsen, P. Pakhlov, G. Pakhlova, C. W. Park, H. Park, L. S. Peak, L. E. Piilonen, H. Sahoo, Y. Sakai, O. Schneider, J. Schümann, K. Senyo, M. E. Sevior, M. Shapkin, H. Shibuya, J. G. Shiu, B. Shwartz, J. B. Singh, A. Somov, S. Stanič, M. Starič, T. Sumiyoshi, F. Takasaki, K. Tamai, M. Tanaka, Y. Teramoto, I. Tikhomirov, S. Uehara, T. Uglov, Y. Unno, S. Uno, P. Urquijo, Y. Usov, G. Varner, K. Vervink, S. Villa, C. C. Wang, C. H. Wang, Y. Watanabe, E. Won, B. D. Yabsley, A. Yamaguchi, Y. Yamashita, M. Yamauchi, C. C. Zhang, Z. P. Zhang, A. Zupanc, O. Zyukova

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25 Citations (Scopus)

Abstract

The process e+e-→K+K-J/ψ is observed for the first time via initial-state radiation. The cross section of e+e-→K+K-J/ψ for center-of-mass energies between threshold and 6.0 GeV is measured using 673fb-1 of data collected with the Belle detector on and off the Υ(4S) resonance. No significant signal for Y(4260)→K+K-J/ψ is observed, and we determine B(Y(4260)→K+K-J/ψ)Γ(Y(4260)→e+e-)<1.2eV/c2 at a 90% confidence level. We also find evidence for e+e-→KS0KS0J/ψ in the same data sample.

Original languageEnglish
Article number011105
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume77
Issue number1
DOIs
Publication statusPublished - 2008 Jan 16

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics
  • Physics and Astronomy (miscellaneous)

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