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Measurements of Spin-Sensitive Quantities in Hadronic Decays of Z0 Bosons Produced in e+e- Annihilations


In 1992 the SLD experiment at SLAC collected over 11,000 hadronic decay events of Z 0 bosons produced in collisions of polarised electrons with unpolarised positrons delivered by the SLC. Preliminary experimental results are presented on tests of the value of the gluon spin involving events containing three hadronic jets measured in the final state. A leading order QCD prediction is found to be in agreement with the data, whilst a model including scalar gluons is clearly excluded. Effects of the electron beam polarisation upon the orientation of the three-jet event plane are discussed.

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