Measurements of and a Search for Heavy-Quark Production in Annihilation at GeV
- 11 January 1988
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 60 (2), 93-96
- https://doi.org/10.1103/physrevlett.60.93
Abstract
The ratio of the cross section for annihilation into hadronic final states to the QED cross section for muon-pair production is measured to be 4.34±0.45±0.30 and 4.23±0.20±0.21 at c.m. energies of 50 and 52 GeV, respectively. From these values of and an analysis of the event shapes we deduce a 95%-confidence-level upper limit for the production rate of new heavy charge or quarks to be 0.19 units of .
Keywords
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