Observation of the Φ (1680) and the Y(2175) in e+e-→Φ π+π

C. P. Shen, C. Z. Yuan, P. Wang, X. L. Wang, I. Adachi, H. Aihara, K. Arinstein, V. Aulchenko, A. M. Bakich, E. Barberio, K. Belous, M. Bischofberger, A. Bondar, M. Bračko, T. E. Browder, P. Chang, A. Chen, B. G. Cheon, R. Chistov, I. S. ChoS. K. Choi, Y. Choi, J. Crnkovic, J. Dalseno, M. Danilov, M. Dash, W. Dungel, S. Eidelman, D. Epifanov, N. Gabyshev, A. Garmash, P. Goldenzweig, H. Ha, K. Hayasaka, H. Hayashii, Y. Horii, Y. Hoshi, W. S. Hou, H. J. Hyun, T. Iijima, K. Inami, A. Ishikawa, R. Itoh, M. Iwasaki, Y. Iwasaki, J. H. Kang, P. Kapusta, H. Kawai, T. Kawasaki, H. Kichimi, H. O. Kim, J. H. Kim, Y. I. Kim, Y. J. Kim, B. R. Ko, S. Korpar, M. Kreps, P. Križan, P. Krokovny, W. Kuehn, R. Kumar, A. Kuzmin, Youngjoon Kwon, S. H. Kyeong, J. S. Lange, M. J. Lee, S. H. Lee, T. Lesiak, J. Li, A. Limosani, C. Liu, D. Liventsev, R. Louvot, F. Mandl, A. Matyja, S. McOnie, K. Miyabayashi, H. Miyata, Y. Nagasaka, E. Nakano, M. Nakao, S. Nishida, K. Nishimura, O. Nitoh, S. Ogawa, T. Ohshima, S. Okuno, S. L. Olsen, H. Ozaki, P. Pakhlov, G. Pakhlova, C. W. Park, H. Park, H. K. Park, L. E. Piilonen, A. Poluektov, H. Sahoo, K. Sakai, Y. Sakai, O. Schneider, C. Schwanda, K. Senyo, M. E. Sevior, V. Shebalin, J. G. Shiu, B. Shwartz, J. B. Singh, A. Sokolov, S. Stanič, M. Starič, T. Sumiyoshi, G. N. Taylor, Y. Teramoto, K. Trabelsi, S. Uehara, T. Uglov, Y. Unno, S. Uno, P. Urquijo, Y. Usov, G. Varner, K. Vervink, A. Vinokurova, C. H. Wang, M. Z. Wang, Y. Watanabe, R. Wedd, E. Won, B. D. Yabsley, Y. Yamashita, C. C. Zhang, Z. P. Zhang, V. Zhilich, V. Zhulanov, T. Zivko, A. Zupanc, O. Zyukova

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Abstract

The cross sections for e+e-→Φ π+π- and e+e-→Φ f0(980) are measured from threshold to s=3.0GeV using initial-state radiation. The analysis is based on a data sample of 673fb-1 collected on and below the Υ(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider. First measurements are reported for the resonance parameters of the Φ (1680) in the Φ π+π- mode: m=(1689±7±10)MeV/c2 and Γ=(211±14±19)MeV/c2. A structure at s=2.1GeV/c2, corresponding to the so called Y(2175), is observed; its mass and width are determined to be (2079±13-28+79)MeV/c2 and (192±23-61+25)MeV/c2, respectively.

Original languageEnglish
Article number031101
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume80
Issue number3
DOIs
Publication statusPublished - 2009 Aug 4

All Science Journal Classification (ASJC) codes

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

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    Shen, C. P., Yuan, C. Z., Wang, P., Wang, X. L., Adachi, I., Aihara, H., Arinstein, K., Aulchenko, V., Bakich, A. M., Barberio, E., Belous, K., Bischofberger, M., Bondar, A., Bračko, M., Browder, T. E., Chang, P., Chen, A., Cheon, B. G., Chistov, R., ... Zyukova, O. (2009). Observation of the Φ (1680) and the Y(2175) in e+e-→Φ π+π. Physical Review D - Particles, Fields, Gravitation and Cosmology, 80(3), [031101]. https://doi.org/10.1103/PhysRevD.80.031101