抄録
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.
本文言語 | English |
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ページ(範囲) | 295-302 |
ページ数 | 8 |
ジャーナル | Zeitschrift für Physik C Particles and Fields |
巻 | 6 |
号 | 4 |
DOI | |
出版ステータス | Published - 1980 12 |
ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)