Determining the β function of the strong interaction coupling and closing the light gluino window

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Abstract

We discuss the perturbative running of αs in a model independent way. Our analysis contains data on the hadronic τ decay and hadronic cross sections in e+ e- annihilation between 5 GeV and Mz We determine the color coefficients and the perturbative β function of the strong interaction. The results are in agreement with QCD and rule out the QCD + light gluino scenarios on the 70.8%-93.0% C.L. We combine our method with that of the multijet analysis at LEP. The combined result rules out light gluinos on the 99.76% C.L., provided that nonperturbative effects are not large.

Original languageEnglish
Pages (from-to)4335-4338
Number of pages4
JournalPhysical review letters
Volume78
Issue number23
DOIs
Publication statusPublished - Jun 9 1997

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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