Search for a fourth-generation charge -(1/3 quark

Document Type

Article

Publication Date

1-1-1989

Abstract

By studying e+e- annihilations in the center-of-mass energy range between 50 and 60.8 GeV, we have established a 95%-confidence-level lower limit on the mass of a fourth-generation charge -(1/3 quark b of 27.2 GeV. In contrast with all previous searches, this limit has been obtained through consideration of the decay processes b'b and b'bg aswell as b'cW-. For the cases where any one of the three decay modes dominates, we obtain higher mass limits. © 1989 The American Physical Society.

Publication Source (Journal or Book title)

Physical Review Letters

First Page

1910

Last Page

1913

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