The strong coupling constant at low Q^2

Details The strong coupling constant at low Q^2 The strong coupling constant at low Q^2

2005-09-19

arxiv.org/abs/hep-ph/0509188v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

6 pages, Contribution to the proceedings of the First Workshop on Quark-Hadron Duality and the Transition to pQCD (Duality05,

Scientific paper

We extract an effective strong coupling constant using low-Q^2 data and sum rules. Its behavior is established over the full Q^2-range and is compared to calculations based on lattice QCD, Schwinger-Dyson equations and a quark model. Although the connection between all these quantities is not known yet, the results are surprisingly alike. Such a similitude may be related to quark-hadron duality.

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