Measurement of the charged multiplicity of bottom and light quark events in e+e− annihilation at [formula omitted] GeV

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

doi:10.1016/s0370-2693(98)00073-2

Measurement of the charged multiplicity of bottom and light quark events in e+e− annihilation at [formula omitted] GeV

K Okabe , T Ohama + Show 61 more

https://doi.org/10.1016/s0370-2693(98)00073-2

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Journal: Physics Letters B	Publication Date: Mar 1, 1998
Citations: 6

Affiliation: Okayama University of Science, Hiroshima University, High Energy Accelerator Research Organization, Yasuda Women's University, University of Tsukuba, Kyoto University, Tokyo Metropolitan University, Kobe University, Osaka University, University of Helsinki, University of Miyazaki, Tohoku Gakuin University, Tohoku University, University of Toyama

#Light-quark Events #Mean Charged Multiplicity + Show 8 more

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Abstract

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.

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