Search for a fourth-generation quark with -Q-=e/3 in e+e- collisions at s =56"57 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, M. Sakuda, N. Sasao, M. Sato, M. Shioden, J. Shirai, S. Sugimoto, T. Sumiyoshi, Y. Suzuki, Y. Takada, F. Takasaki, A. Taketani, N. Tamura, R. Tanaka, N. Terunuma, K. Tobimatsu, T. Tsuboyama, A. Tsukamoto, S. Uehara, Y. Unno, M. Utsumi, M. Wakai, T. Watanabe, Y. Watase, Y. Yamada, T. Yamagata, T. Yamashita, Y. Yonezawa, H. Yoshida

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Abstract

A search for a fourth-generation quark with -Q-=e/3 has been made with the VENUS detector at the KEK e+e- collider TRISTAN. Multihadron events with a spherical shape or containing isolated leptons were studied. There is no evidence for an excess production of such events in e+e- collision at s =56"57 GeV and a lower limit on the mass is 27.5 GeV/c2 at the 95% C.L.

Original languageEnglish
Pages (from-to)3524-3527
Number of pages4
JournalPhysical Review D
Volume39
Issue number11
DOIs
Publication statusPublished - 1989

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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    Abe, K., Amako, K., Arai, Y., Asano, Y., Chiba, M., Chiba, Y., Daigo, M., Emura, T., Endo, I., Fukawa, M., Fukui, T., Fukushima, Y., Haba, J., Haidt, D., Hayashibara, I., Hemmi, Y., Higuchi, M., Hirose, T., Hojyo, Y., ... Yoshida, H. (1989). Search for a fourth-generation quark with -Q-=e/3 in e+e- collisions at s =56"57 GeV. Physical Review D, 39(11), 3524-3527. https://doi.org/10.1103/PhysRevD.39.3524