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Your search keyword '"T. Suwada"' showing total 3 results
Start Over Author "T. Suwada" Journal physics letters b
3 results on '"T. Suwada"'

1. Charge asymmetry measurement in e+e−→μ+μ− and τ+τ− reactions at and 55 GeV

Author

I. Adachi, H. Aihara, H.B. Dijkstra, R. Enomoto, H. Fujii, K. Fujii, T. Fujii, J. Fujimoto, N. Fujiwara, H. Hayashi, S. Higashi, N. Iida, A. Imanishi, H. Ikeda, T. Ishii, R. Itoh, S. Iwata, H. Iwasaki, R. Kajikawa, T. Kamae, S. Kato, S. Kawabata, H. Kichimi, T. Kishida, M. Kobayashi, S. Kuroda, N. Kusuki, A. Maruyama, K. Maruyama, H. Masuda, T. Matsuda, A. Miyamoto, T. Morimoto, K. Nakamura, O. Nitoh, S. Noguchi, F. Ochiai, T. Ohshima, H. Okuno, T. Okusawa, H. Ozaki, T. Sato, F. Sai, J. Shimonaka, K. Shimozawa, A. Shirahashi, R. Sugahara, A. Sugiyama, S. Suzuki, T. Suwada, K. Takahashi, T. Takahashi, H. Takamure, T. Tanaka, T. Tauchi, Y. Teramoto, T. Tsukamoto, K. Ukai, S. Uno, Y. Watanabe, O. Yamakawa, A. Yamamoto, S. Yamamoto, S. Yamashita, M. Yamauchi, Y. Yoshimura, and M. Yoshioka

Subjects
Nuclear physics, Physics, Topaz, Nuclear and High Energy Physics, media_common.quotation_subject, Electroweak interaction, engineering, Charge (physics), engineering.material, Atomic physics, Asymmetry, media_common, Standard Model
Abstract

The 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.

Published
1988
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2. Measurement of the processes e+e−→e+e− and e+e−→γγ at

Author

Akiya Miyamoto, Tadayuki Takahashi, T. Okusawa, T. Morimoto, S. Iwata, N. Fujiwara, A. Shirahashi, O. Yamakawa, H. Iwasaki, Y. X. Watanabe, S. Kawabata, Y. Teramoto, T. Suwada, A. Maruyama, H. B. Dijkstra, T. Ishii, J. Shimonaka, T. Ohshima, J. Fujimoto, Ryuhei Sugahara, T. Kishida, S. Kuroda, R. Enomoto, F. Ochiai, T. Tanaka, R. Kajikawa, A. Imanishi, A. Sugiyama, Toshiaki Tauchi, Tomohiro Matsuda, H. Takamure, S. Uno, Hideki Okuno, Toru Sato, N. Iida, O. Nitoh, S. Noguchi, Shiro Suzuki, H. Hayashii, S. Higashi, Terushige Fujii, S. Kato, T. Tsukamoto, K. Shimozawa, H. Kichimi, K. Nakamura, H. Masuda, K. Maruyama, Fuminori Sai, Kumataro Ukai, K. Takahashi, M. Yoshioka, Makoto Kobayashi, N. Kusuki, S. Yamamoto, M. Yamauchi, Akira Yamamoto, I. Adachi, Y. Yoshimura, H. Ikeda, T. Kamae, H. Ozaki, H. Aihara, K. Fujii, S. Yamashita, R. Itoh, and H. Fujii

Subjects
Physics, Elastic scattering, Nuclear and High Energy Physics, Particle physics, Antiparticle, Annihilation, Astrophysics::High Energy Astrophysical Phenomena, Electron–positron annihilation, Elementary particle, Nuclear physics, Antimatter, High Energy Physics::Experiment, Nuclear Experiment, Bhabha scattering, Lepton
Abstract

Differential cross sections for the processes e + e − → e + e − (Bhabha scattering) and e + e − → γγ have been measured with the TOPAZ detector at s =52 GeV . The results agree with the predictions of quantum electrodynamics (QED). The lower limits for the QED cut-off parameters have been obtained to be Λ + ⩾115 GeV and Λ − ⩾236 GeV for Bhabha scattering, and Λ + ⩾94 GeV and Λ − ⩾59 GeV for the reaction e + e − → γγ .

Published
1988
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3. Search for susy particles in e+e− annihilation at tristan

Author

I. Adachi, H. Aihara, H.B. Dijkstra, R. Enomoto, H. Fujii, K. Fujii, T. Fujii, J. Fujimoto, K. Fujiwara, N. Fujiwara, H. Hayashii, S. Higashi, B. Howell, N. Iida, A. Imanishi, H. Ikeda, T. Ishii, R. Itoh, H. Iwasaki, S. Iwata, R. Kajikawa, T. Kamae, S. Kato, S. Kawabata, Y. Kayahara, H. Kichimi, T. Kishida, M. Kobayashi, D. Koltick, S. Kuroda, N. Kusuki, A. Maruyama, K. Maruyama, H. Masuda, T. Matsuda, A. Miyamoto, T. Morimoto, K. Muramatsu, K. Nakamura, O. Nitoh, S. Noguchi, F. Ochiai, T. Ohshima, H. Okuno, T. Okusawa, H. Ozaki, T. Sato, F. Sai, N. Sasayama, A. Shimonaka, K. Shimozawa, A. Shirahashi, R. Sugahara, A. Sugiyama, S. Suzuki, T. Suwada, K. Takahashi, T. Takahashi, H. Takamure, T. Tanaka, T. Tauchi, Y. Teramoto, T. Tsukamoto, K. Ukai, S. Uno, Y. Watanabe, O. Yamakawa, A. Yamamoto, S. Yamamoto, S. Yamashita, M. Yamauchi, Y. Yoshimura, and M. Yoshioka

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Annihilation, Muon, Astrophysics::High Energy Astrophysical Phenomena, Electron–positron annihilation, High Energy Physics::Phenomenology, Nuclear physics, Particle decay, Pair production, Chargino, High Energy Physics::Experiment, Nuclear Experiment, Photino, Lepton
Abstract

The TOPAZ detector has accumulated about 11 pb−1 of data in the energy range s =52−57 GeV . Charged supersymmetric particles have been searched for. Assuming the photino to be massless, we place limits on the chargino of m χ GeV , on the scalar muon, tau, and quark of m μ GeV , m τ GeV , and m q GeV . The scalar electron can be excluded up to a mass of ∼ 28 GeV. Other cases are examined.

Published
1989
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