QCD Studies at LEP I

Details QCD Studies at LEP I QCD Studies at LEP I

1996-04-26

arxiv.org/abs/hep-ex/9604009v1

Physics

High Energy Physics

High Energy Physics - Experiment

1 uuencoded PostScript file. Invited talk at Les Rencontres de Physique de la Vall\'ee d'Aoste, La Thuile, March 3-9, 1996

Scientific paper

The high hadronic event statistics collected at the Z energy (LEP I) allowed a good understanding of the QCD dynamics. The coupling constant $\alpha_s$ has been measured with several methods giving a global average $\alpha_s(M_Z) = 0.122 \pm 0.004$. The flavour independence of $\alpha_s$ has been tested obtaining $\alpha_s^b/\alpha_s^{udsc} = 0.997 \pm 0.023$. Quark-gluon jet differencies has been observed among which $_{gluon}/_{quark} = 1.234 \pm 0.027$. A big role has been plaied by the silicon vertex detectors.

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