Vector and Axial-Vector correlators in a instanton-like quark model

Details Vector and Axial-Vector correlators in a instanton-like quark model Vector and Axial-Vector correlators in a instanton-like quark model

2004-07-31

arxiv.org/abs/hep-ph/0408003v2

Int.J.Mod.Phys. A20 (2005) 631-633

Physics

High Energy Physics

High Energy Physics - Phenomenology

3 pages, 2 figures. Talk given at MESON 2004: 8th International Workshop on Meson Production, Properties and Interactions, Cra

Scientific paper

10.1142/S0217751X05021993

The behavior of the vector Adler function at spacelike momenta is studied in the framework of a covariant chiral quark model with instanton-like quark-quark interaction. The model reproduces the Adler function and $V-A$ correlator extracted from the ALEPH and OPAL data on hadronic $\tau$ lepton decays, transformed into the Euclidean domain via dispersion relations. The leading order contribution from hadronic part of the photon vacuum polarization to the anomalous magnetic moment of the muon, $a_{\mu}^{\mathrm{hvp}(1)} $, is estimated.

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