Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2011-07-13
Phys.Lett.B704:211-217,2011
Physics
High Energy Physics
High Energy Physics - Phenomenology
9 pages, 8 figures
Scientific paper
10.1016/j.physletb.2011.09.019
We present a calculation of the hadronic vacuum polarization (HVP) tensor within the framework of Dyson--Schwinger equations. To this end we use a well-established phenomenological model for the quark-gluon interaction with parameters fixed to reproduce hadronic observables. From the HVP tensor we compute both the Adler function and the HVP contribution to the anomalous magnetic moment of the muon, $a_\mu$. We find $a_\mu^{HVP}= 6760\times 10^{-11}$ which deviates about two percent from the value extracted from experiment. Additionally, we make comparison with a recent lattice determination of $a_\mu^{HVP}$ and find good agreement within our approach. We also discuss the implications of our result for a corresponding calculation of the hadronic light-by-light scattering contribution to $a_\mu$.
Fischer Christian S.
Goecke Tobias
Williams Richard
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