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arXiv · hep-ph/9705319

The Banks-Zaks Expansion and "Freezing" in Perturbative QCD

S. A. Caveny·P. M. Stevenson
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Abstract

The recent calculation of the four-loop beta function in QCD provides further evidence that the Banks-Zaks expansion in 16half-n_f is sufficiently well behaved to be useful even for n_f=2 light flavours. This expansion inherently predicts "freezing" of the QCD couplant at low energies as a perturbative effect. We consider the e+e- and Bjorken-sum-rule cases as examples.

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S. A. Caveny, P. M. Stevenson. 1997-05-15. The Banks-Zaks Expansion and "Freezing" in Perturbative QCD. https://arxiv.org/abs/hep-ph/9705319

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