Published February 21, 1991 | Version v1
Journal article

Charge asymmetry of hadronic events in e+e- annihilation at √s=57.9 GeV

  • 1. Nagoya Univ. (Japan). Dept. of Physics
  • 2. National Lab. for High Energy Physics, Tsukuba, Ibaraki (Japan)
  • 3. Kobe Univ. (Japan). Dept. of Physics
  • 4. Tokyo Univ. of Agriculture and Technology, Fuchu (Japan). Dept. of Applied Physics
  • 5. Nara Women's Univ. (Japan). Dept. of Physics
  • 6. Purdue Univ., Lafayette, IN (USA). Dept. of Physics
  • 7. Tokyo Univ. (Japan). Inst. for Nuclear Study
  • 8. Osaka City Univ. (Japan). Dept. of Physics
  • 9. Tokyo Univ. (Japan). Dept. of Physics
  • 10. Kobe Univ. (Japan). Graduate School of Science and Technology
  • 11. Tokyo Inst. of Tech. (Japan). Dept. of Physics
  • 12. Tezukayama Univ., Nara (Japan). Faculty of Liberal Arts

Description

The charge asymmetry of quark jets produced in e+e- annihilations at <√s>=57.9 GeV was measured with the TOPAZ detector at TRISTAN. The observed charge asymmetry is +0.091±0.014 (stat.)±0.016 (sys.). From the measured differential cross section, the axial vector coupling constant averaged over all quark flavors was determined to be 1.09-0.21+0.27. These values are consistent with the standard model predictions. Possible deviations from the standard model were examined in terms of contact interactions, and the lower limits on the compositeness scale parameters were obtained to be 1.2-7.1 TeV at the 95% confidence level. (orig.)

Additional details

Publishing Information

Journal Title
Physics Letters, (Section) B
Journal Volume
255
Journal Issue
4
Series
Phys. Lett., B.
Journal Page Range
613-622
ISSN
0370-2693
CODEN
PYLBA

Optional Information

Collaborations
TOPAZ Collaboration.