Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2007-10-24
Phys.Rev.D77:074021,2008
Physics
High Energy Physics
High Energy Physics - Phenomenology
two references added
Scientific paper
10.1103/PhysRevD.77.074021
We present a specific class of models for an infrared-finite analytic QCD coupling, such that at large space-like energy scales the coupling differs from the perturbative one by less than any inverse power of the energy scale. This condition is motivated by the ITEP Operator Product Expansion philosophy. Allowed by the ambiguity in the analytization of the perturbative coupling, the proposed class of couplings has three parameters. In the intermediate energy region, the proposed coupling has low loop-level and renormalization scheme dependence. The present modification of perturbative QCD must be considered as a phenomenological attempt, with the aim of enlarging the applicability range of the theory of the strong interactions at low energies.
Cvetic Gorazd
Valenzuela Cristian
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