Hadronic contribution to the muon g-2: a Dyson-Schwinger perspective

Abstract

We summarize our results for hadronic contributions to the anomalous magnetic moment of the muon ($a_{\mu }$), the one from hadronic vacuum-polarisation (HVP) and the light-by-light scattering contribution (LBL), obtained from the Dyson-Schwinger equations (DSE's) of QCD. In the case of HVP we find good agreement with model independent determinations from dispersion relations for $a_{\mu }^{\mathrm{HVP}}$ as well as for the Adler function with deviations well below the ten percent level. From this we conclude that the DSE approach should be capable of describing $a_{\mu }^{\mathrm{LBL}}$ with similar accuracy. We also present results for LBL using a resonance expansion of the quark anti-quark T-matrix. Our preliminary value is $a_{\mu }^{\mathrm{LBL}}=(217\pm 91)\times 10^{-11}$.

Contribution to the proceedings of 'International school of nuclear physics, 33rd course', Erice-Sicily: 16 - 24 September 2011

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Cited by in corpus (2)

• Hadronic Contributions to the Muon Anomaly in the Constituent Chiral Quark Model
• Muon g-2 through a flavor structure on soft SUSY terms