Measurement of τ polarization in e+e- annihilation at √s = 58 GeV

H. Hanai, J. Haba, K. Abe, K. Amako, Y. Arai, T. Arima, Y. Asano, M. Chiba, Y. Chiba, M. Daigo, M. Fukawa, Y. Fukushima, H. Hamasaki, Y. Hemmi, M. Higuchi, T. Hirose, Y. Homma, N. Hosoda, N. Ishihara, Y. IwataJ. Kanzaki, R. Kikuchi, T. Kondo, T. T. Korhonen, H. Kurashige, E. K. Matsuda, T. Matsui, M. Miura, K. Miyake, S. Mori, Y. Nagashima, Y. Nakagawa, T. Nakamura, I. Nakano, S. Odaka, K. Ogawa, T. Ohama, T. Ohsugi, H. Ohyama, K. Okabe, A. Okamoto, A. Ono, J. Pennanen, H. Sakamoto, M. Sakuda, M. Sato, N. Sato, M. Shioden, J. Shirai, T. Sumiyoshi, Y. Takada, F. Takasaki, M. Takita, N. Tamura, D. Tatsumi, K. Tobimatsu, T. Tsuboyama, S. Uehara, Y. Unno, T. Watanabe, Y. Watase, F. Yabuki, Y. Yamada, T. Yamagata, Y. Yonezawa, H. Yoshida, K. Yusa

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Abstract

The polarization of τ leptons in the reaction e+e- → τ+τ- has been measured using a e+e- collider, TRISTAN, at the center-of-mass energy of 58 GeV. From the kinematical distributions of daughter particles in τ → eνν̄, μνν̄, ρν or π(K)ν decays, the average polarization of τ- and its forward-backward asymmetry have been evaluated to be 0.012±0.058 and 0.029±0.057, respectively.

Original languageEnglish
Pages (from-to)155-162
Number of pages8
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume403
Issue number1-2
DOIs
Publication statusPublished - Jun 19 1997

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics

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    Hanai, H., Haba, J., Abe, K., Amako, K., Arai, Y., Arima, T., Asano, Y., Chiba, M., Chiba, Y., Daigo, M., Fukawa, M., Fukushima, Y., Hamasaki, H., Hemmi, Y., Higuchi, M., Hirose, T., Homma, Y., Hosoda, N., Ishihara, N., ... Yusa, K. (1997). Measurement of τ polarization in e+e- annihilation at √s = 58 GeV. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 403(1-2), 155-162. https://doi.org/10.1016/S0370-2693(97)00506-6