CHARGE ASYMMETRY OF HADRONIC EVENTS IN E+E- ANNIHILATION AT SQUARE-ROOT-S=57.9GEV

被引：15

作者：

ADACHI, I

机构：

[1] Department of Physics, Nagoya University, Nagoya

[2] KEK, National Laboratory for High Energy Physics, Ibaraki-ken

[3] Department of Physics, Kobe University, Kobe

[4] Department of Applied Physics, Tokyo University of Agriculture and Technology, Tokyo

[5] Department of Physics, Nara Women's University, Nara

[6] Department of Physics, Purdue University, West Lafayette

[7] Institute for Nuclear Study, University of Tokyo, Tokyo

[8] Department of Physics, University of Tokyo, Tokyo

[9] Department of Physics, Osaka City University, Osaka

[10] The Graduate School of Science and Technology, Kobe University, Kobe

[11] Department of Physics, Tokyo Institute of Technology, Tokyo

[12] Faculty of Liberal Arts, Tezukayama University, Nara

来源：

PHYSICS LETTERS B | 1991年 / 255卷 / 04期

关键词：

D O I：

10.1016/0370-2693(91)90277-W

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The charge asymmetry of quark jets produced in e+e- annihilations at <square-root 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.

引用

页码：613 / 622

页数：10

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