A study on single photon production at √s=54.0-61.4 GeV

K. Abe, K. Amako, Y. Arai, Y. Asano, M. Chiba, Y. 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. HommaY. Hoshi, Y. Ikegami, N. Ishihara, T. Kamitani, N. Kanematsu, J. Kanzaki, R. Kikuchi, T. Kondo, T. Koseki, H. Kurashige, T. Matsui, M. Minami, K. Miyake, S. Mori, Y. Nagashima, T. Nakamura, I. Nakano, Y. Narita, S. Odaka, K. Ogawa, T. Ohama, T. Ohsugi, A. Okamoto, A. Ono, H. Osabe, T. Oyama, H. Saito, H. Sakae, H. Sakamoto, S. Sakamoto, M. Sakano, Makoto Sakuda, N. Sasao, M. Sato, M. Shioden, J. Shirai, S. Shirakata, S. Sugimoto, T. Sumiyoshi, S. Suzuki, Y. Suzuki, Y. Takada, F. Takasaki, A. Taketani, M. Takita, N. Tamura, R. Tanaka, N. Terunuma, K. Tobimatsu, T. Tsuboyama, A. Tsukamoto, S. Uehara, Y. Unno, M. Utsumi, M. Wakai, T. Watanabe, Y. Watase, F. Yabuki, Y. Yamada, T. Yamagata, T. Yamashita, Y. Yonezawa, H. Yoshida

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19 Citations (Scopus)


A 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.

Original languageEnglish
Pages (from-to)431-436
Number of pages6
JournalPhysics Letters B
Issue number3
Publication statusPublished - Dec 7 1989
Externally publishedYes

ASJC Scopus subject areas

  • Nuclear and High Energy Physics


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