Lattice simulations for the running coupling constant of QCD

Details Lattice simulations for the running coupling constant of QCD Lattice simulations for the running coupling constant of QCD

2002-09-05

arxiv.org/abs/hep-lat/0209076v1

Physics

High Energy Physics

High Energy Physics - Lattice

10 pages; invited seminar presented at the VIII International Workshop on Hadron Physics 2002, Bento Goncalves RS, Brazil, Apr

Scientific paper

The strong coupling constant alpha_s(mu_0), taken at a fixed reference scale mu_0, is the single free parameter of QCD and should be known to the highest available precision. The value of alpha_s should also be determined with good accuracy over as large a range of scales as possible, in order to reveal potential anomalous running in the strength of the strong interaction. Lattice QCD is now able to calculate alpha_s with accuracy comparable to or better than experiment. We review the status of such lattice calculations in quenched and full QCD.

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