Measurement of the charged multiplicity of bottom and light quark events in e+e- annihilation at √s = 58 GeV

K. Okabe, Y. Yamada, D. Tatsumi, K. Abe, K. Amako, Y. Arai, Y. Asano, M. Chiba, Y. Chiba, M. Daigo, M. Fukawa, Y. Fukushima, J. Haba, H. Hamasaki, Y. Hemmi, M. Higuchi, T. Hirose, Y. Homma, N. Ishihara, Y. IwataJ. Kanzaki, R. Kikuchi, T. Kondo, T. T. Korhonen, H. Kurashige, E. K. Matsuda, T. Matsui, K. Miyake, S. Mori, Y. Nagashima, Y. Nakagawa, T. Nakamura, I. Nakano, S. Odaka, K. Ogawa, T. Ohama, T. Ohsugi, H. Ohyama, A. Okamoto, A. Ono, J. Pennanen, H. Sakamoto, M. Sakuda, M. Sato, N. Sato, M. Shioden, J. Shirai, T. Sumiyoshi, Y. Takada, F. Takasaki, M. Takita, N. Tamura, K. Tobimatsu, T. Tsuboyama, S. Uehara, Y. Unno, T. Watanabe, Y. Watase, F. Yabuki, T. Yamagata, Y. Yonezawa, H. Yoshida, K. Yusa

Research output: Contribution to journalArticlepeer-review

13 Citations (Scopus)


The charged-particle multiplicity is measured for b-quark and light-quark (u, d, s) events in e+e- annihilation at √s = 58 GeV. Two independent methods, lepton tagging and decay-length tagging, are applied to enrich b-quark events. These methods provide event samples having different concentrations of b-quark events. The mean charged multiplicity is measured to be 19.38 ± 0.27 ± 0.84 for b-quark events, and 15.91 ± 0.04 ± 0.70 for light-quark events. The results are compared with predictions of phenomenological and theoretical models.

Original languageEnglish
Pages (from-to)407-418
Number of pages12
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Issue number3-4
Publication statusPublished - Mar 26 1998
Externally publishedYes


  • Bottom and light quarks
  • Charged particle multiplicity
  • Fragmentation into hadrons
  • Hadron production by electron-positron collisions
  • Strong interaction

ASJC Scopus subject areas

  • Nuclear and High Energy Physics


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