A study on single photon production at √s=54.0–61.4 GeV
1989; Elsevier BV; Volume: 232; Issue: 3 Linguagem: Inglês
10.1016/0370-2693(89)90769-7
ISSN1873-2445
AutoresK. Abe, B. R. Ko, Y. Arai, Y. Asano, M. Chiba, Yasuo Chiba, M. Daigo, T. Emura, I. Endo, M. Fukawa, T. Fukui, Y. Fukushima, J. Haba, D. Haidt, I. Hayashibara, Y. Hemmi, M. Higuchi, T. Hirose, Y. Hojyo, Y. Homma, Y. Hoshi, Y. Ikegami, N. Ishihara, T. Kamitani, Nobuyuki Kanematsu, J. Kanzaki, R. Kikuchi, T. Kondo, T. Koseki, H. Kurashige, Takayuki Matsui, M. Minami, K. Miyake, Shigeki Mori, Y. Nagashima, T. Nakamura, I. Nakano, Y. Narita, S. Odaka, K. Ogawa, T. Ohama, T. Ohsugi, A. Okamoto, A. Ono, H. Osabe, Takashi Oyama, Hitoshi Saitô, H. Sakae, H. Sakamoto, S. Sakamoto, M. Sakano, M. Sakuda, N. Sasao, M. Sato, M. Shioden, J. Shirai, S. Shirakata, S. Sugimoto, T. Sumiyoshi, S. Suzuki, Y. Suzuki, Yoshihisa Takada, F. Takasaki, A. Taketani, M. Takita, N. Tamura, R. Tanaka, N. Terunuma, K. Tobimatsu, T. Tsuboyama, Akira Tsukamoto, S. Uehara, Y. Unno, M. Utsumi, M. Wakai, Takashi Watanabe, Y. Watase, F. Yabuki, Y. Yamada, T. Yamagata, T. Yamashita, Yasushige Yonezawa, Hajime Yoshida,
Tópico(s)High-Energy Particle Collisions Research
ResumoA study of single photon events, produced in association with light neutrinos or other weakly interacting neutral particlaes in e+e− collisions, has been performed at √s=54.0–61.4 GeV with the VENUS detector at TRISTAN. No anomalous signal has been observed in a data sample corresponding to an integrated luminosity of 28.2 pb−1. This result indicates that the upper limit on the number of light neutrinos, Nν, is 11 (15) at a 90 (95)% confidence level. Combining this with published results from other e+e− experiments, the number of light neutrinos is limited to Nν<3.9(4.8) at the 90 (95)% confidence level. Limits are also placed on the mass of supersymmetric particles.
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