Very low energy matching of effective meson theories with QCD

Details Very low energy matching of effective meson theories with QCD Very low energy matching of effective meson theories with QCD

2002-07-23

arxiv.org/abs/hep-ph/0207284v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

6 pages, 2 eps figures

Scientific paper

A simple matching procedure is proposed to extract constraints on effective meson theories. In this way, a QCD prediction for the pion decay constant is found, F(pi)=2 m(pi)/pi, i.e. approximately 90MeV. The same procedure also determines other mesonic observables, like the decay width of the sigma meson to two photons. Finally, some information which can be gained about the hadronic light-by-light contributions to the muon anomalous moment are briefly commented.

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