On the QCD coupling behavior in the infrared region

2002/08/08 by D. V. Shirkov
Physics and Astronomy · #hep-ph

paper · pdf

published as Theor.Math.Phys. 132 (2002) 1309-1319; Teor.Mat.Fiz. 132 (2002) 484-496 · 14 pages, LaTeX2e; To appear in TMP vol.132, No 3 (Sept.2002)

arxiv created 2002/08/08 · arxiv updated 2009/11/30

Abstract

The summary of nonperturbative results for the QCD invariant coupling baralpha_s obtained by lattice simulations for functional integral and by solution of approximate Dyson--Schwinger equations reveals a puzzling variety of IR behavior of baralpha_s(Q²) even on a qualitative level. This, in turn, rises a question of correspondence between the results obtained so far by different groups. We analyze this issue in terms of mass-dependent coupling constant transformations and conclude that the question of the IR behavior of effective QCD coupling and of propagators is not a well--defined one and needs to be more specified.

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