QCD Perturbation Theory at Low Energies

Details QCD Perturbation Theory at Low Energies QCD Perturbation Theory at Low Energies

1992-07-09

arxiv.org/abs/hep-ph/9207228v1

Phys.Rev.Lett. 69 (1992) 1320-1323

Physics

High Energy Physics

High Energy Physics - Phenomenology

11 pages including 3 Postscript Figures using Epsf.tex, LaTex

Scientific paper

10.1103/PhysRevLett.69.1320

We apply the optimization procedure based on the Principle of Minimal
Sensitivity to the third-order calculation of $\R$. The effective couplant
remains finite, freezing to a value $\alpha_s/\pi = 0.26$ at low energies.
Using Poggio-Quinn-Weinberg smearing we find good agreement between theory and
experiment right down to zero energy.

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