A study of the charm and bottom quark production in e+e- annihilation at s = 58 GeV using prompt electrons

K. Abe, K. Amako, Y. Arai, T. Arima, Y. Asano, M. Chiba, Y. Chiba, M. Daigo, M. Fukawa, Y. Fukushima, J. Haba, Y. Hemmi, M. Higuchi, F. Hinode, T. Hirose, Y. Homma, Y. Hoshi, N. Hosoda, N. Ishihara, E. KanataniN. Kanda, N. Kanematsu, J. Kanzaki, R. Kikuchi, T. Kondo, T. T. Korhonen, A. Krüger, H. Kurashige, J. MacNaughton, T. Matsui, M. Miura, K. Miyake, S. Mori, Y. Nagashima, T. Nakamura, I. Nakano, S. Odaka, K. Ogawa, T. Ohama, T. Ohsugi, H. Ohyama, A. Okamoto, A. Ono, T. Oyama, H. Sakamoto, M. Sakuda, M. Sato, N. Sato, M. Shioden, J. Shirai, M. Shirakata, T. Sumiyoshi, A. Suzuki, Y. Takada, H. Takaki, F. Takasaki, M. Takita, N. Tamura, D. Tatsumi, K. Tobimatsu, T. Tsuboyama, S. Uehara, Y. Unno, M. Utsumi, Y. Watase, F. Yabuki, Y. Yamada, T. Yamagata, Y. Yonezawa, H. Yoshida

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14 Citations (Scopus)


We have studied c (charm) and b (bottom) quark production at the TRISTAN energy region by tagging prompt electrons from the semileptonic decays. Electrons were identified over a wide momentum range between 1 and 29 GeV/c by a transition-radiation-detector in addition to a lead-glass calorimeter. The production cross sections of c and b quarks and the mean values of the fragmentation functions for c and b quarks were obtained as σc = 55.9±8.8(stat.)±7.9(syst.) pb, σb = 13.1±2.9(stat.)±1.0(syst.) pb, 〈xc〉 = 0.44±0.08(stat.)±0.04(syst.) and 〈xb〉 = 0.72±0.12(stat.)±0.08(syst.), respectively. The forward-backward asymmetries of the c and b quarks were also measured to be -0.57±0.16(stat.)±0.06(syst.) and -0.64±0.26(stat.)± 0.07(syst.), respectively. Both the cross sections and the forward-backward asymmetries of the c and b quarks are consistent with the standard model.

Original languageEnglish
Pages (from-to)288-298
Number of pages11
JournalPhysics Letters B
Issue number1-2
Publication statusPublished - Aug 26 1993
Externally publishedYes

ASJC Scopus subject areas

  • Nuclear and High Energy Physics


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