All four experiments at LEP have used their data to test the predictions of QCD. The strong coupling constant αs has been measured to higher than O(αs2) in the perturbation expansion. The value of αs has been shown to be flavor independent. The QCD color factors have been measured and found to be consistent with SU(3) as the underlying symmetry of the strong interaction. The existence of the triple gluon vertex has been demonstrated and the spin of the gluon definitively determined. In the realm of soft, non-perturbative QCD, the string effect and other inter-jet phenomena have been investigated. Intra-jet effects have also been examined.
All Science Journal Classification (ASJC) codes
- Atomic and Molecular Physics, and Optics
- Nuclear and High Energy Physics