Search for fractional charge and heavy stable particles at PETRA

W. Bartel*, T. Canzler, D. Cords, P. Dittmann, R. Eichler, R. Felst, D. Haidt, S. Kawabata, H. Krehbiel, B. Naroska, L. H. O'Neill, J. Olsson, P. Steffen, W. L. Yen, E. Elsen, M. Helm, A. Petersen, P. Warming, G. Weber, H. DrummJ. Heintze, G. Heinzelmann, R. D. Heuer, J. von Krogh, P. Lennert, H. Matsumura, T. Nozaki, H. Riesenberg, A. Wagner, D. C. Darwill, F. Foster, G. Hughes, H. Wriedt, J. Allison, A. H. Ball, I. Duerdoth, J. Hassard, F. Loebinger, H. McCann, B. King, A. Macbeth, H. Mills, P. G. Murphy, H. Prosper, K. Stephens, D. Clarke, M. C. Goddard, R. Marshall, G. F. Pearce, M. Imori, T. Kobayashi, S. Komamiya, M. Koshiba, M. Minowa, S. Orito, A. Sato, T. Suda, H. Takeda, Y. Totsuka, Y. Watanabe, S. Yamada, C. Yanagisawa

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

34 Citations (Scopus)


A search has been made for new particles with charge Q=2/3, 1, 4/3, 5/3 produced in e+e--reactions at PETRA. The energy range was Ecm=27-35 GeV. No such particles were found. Upper limits for the cross-section depending on the assumed mass and production spectrum are given. For Q=2/3 quarks with mass less than 12 GeV/c2, upper limits {Mathematical expression} (90% C.L.) are obtained both for inclusive and exclusive production. For the lifetime of the B-meson (mB=5GeV/c2) an upper limit τ≦2×10-9s is obtained.

Original languageEnglish
Pages (from-to)295-302
Number of pages8
JournalZeitschrift für Physik C Particles and Fields
Issue number4
Publication statusPublished - 1980 Dec
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)


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