Charge asymmetry measurement in e+e−→μ+μ− and τ+τ− reactions at and 55 GeV
1988; Elsevier BV; Volume: 208; Issue: 2 Linguagem: Inglês
10.1016/0370-2693(88)90438-8
ISSN1873-2445
AutoresI. Adachi, H. Aihara, Hans Dijkstra, R. Enomoto, H. Fujii, H. Fujii, H. Fujii, J. Fujimoto, N. Fujiwara, H. Hayashi, S. Higashi, N. Iida, A. Imanishi, H. Ikeda, T. Ishii, R. Itoh, S. Iwata, M. Iwasaki, R. Kajikawa, T. Kamae, Seiya Kato, S. Kawabata, H. Kichimi, T. Kishida, M. Kobayashi, Shigeru Kuroda, N. Kusuki, Atsushi Maruyama, K. Maruyama, H. Masuda, Tatsuma D. Matsuda, A. Miyamoto, Takuya MORIMOTO, K. Nakamura, O. Nitoh, S. Noguchi, F. Ochiai, T. Ohshima, Hiroshi G. Okuno, T. Okusawa, H. Ozaki, T. Sato, T. Sato, F. Sai, J. Shimonaka, K. Shimozawa, A. Shirahashi, R. Sugahara, A. Sugiyama, S. Suzuki, T. Suwada, K. Takahashi, T. Takahashi, T. Takahashi, T. Takahashi, H. Takamure, T. Tanaka, T. Tauchi, Y. Teramoto, T. Tsukamoto, T. Tsukamoto, K. Ukai, S. Uno, Y. Watanabe, Osamu Yamakawa, A. Yamamoto, S. Yamamoto, S. Yamashita, M. Yamauchi, Y. Yoshimura, M. Yoshioka,
Tópico(s)Quantum Chromodynamics and Particle Interactions
ResumoThe reactions e+e−→μ+μ− and τ+τ− were measured at s=52 GeV and 55 GeV by using the TOPAZ detector at TRISTAN. For the combined data, the observed charge asymmetry is −0.29±0.13 and the total cross section is 27.9±3.0 (stat.)±0.8 (syst.) pb for μ+μ− production, and those for τ+τ− production are −0.20±0.14 and 35.7±4.3 (stat.)±2.4 (syst.)pb, respectively. These values are consistent with predictions by the standard model of electroweak interactions.
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