Measurement of three-jet distributions sensitive to the gluon spin in e + e - annihilations atsqrt s = 91 GeV
Abstract
Three-jet variables constructed from multi-hadronic events produced by Z 0 decays are compared to theoretical calculations assuming a vector gluon or a hypothetical scalar gluon. The data yield conclusive direct evidence for the former case. The distributions of the reduced energy of the second-most energetic jet and of the cosine of the Ellis-Karliner angle are chosen to demonstrate this effect.
- Publication:
-
Zeitschrift fur Physik C Particles and Fields
- Pub Date:
- December 1991
- DOI:
- 10.1007/BF01562326
- Bibcode:
- 1991ZPhyC..52..543A