We present an update of our lattice QCD study of the vacuum polarization function using O(a)- improved Nf = 2 Wilson fermions with increased statistics and a large set of momenta. The resulting points are highly correlated and thus require a correlated fitting procedure. We employ an extended frequentist method to estimate the systematic uncertainties due to the momentum dependence and to the continuum and chiral extrapolations. We present preliminary results of the leading order hadronic contribution of the anomalous magnetic moment of the muon (aHLO μ) at the physical point for u;d; s and c valence quarks.
|Tidsskrift||Proceedings of Science|
|Status||Udgivet - 2015|
|Begivenhed||33rd International Symposium on Lattice Field Theory, LATTICE 2015 - Kobe, Japan|
Varighed: 14. jul. 2015 → 18. jul. 2015
|Konference||33rd International Symposium on Lattice Field Theory, LATTICE 2015|
|Periode||14/07/2015 → 18/07/2015|
Bibliografisk noteFunding Information:
ACKNOWLEDGEMENTS: Our calculations were performed on the “Wilson” and “Clover” HPC Clusters at the Institute for Nuclear Physics, University of Mainz. We thank Dalibor Djukanovic and Christian Seiwerth for technical support. This research has been supported in part by the DFG via the SFB 1044. G.H. acknowledges support by the the Spanish MINECO through the Ramón y Cajal Programme and through the project FPA2012-31686 and by the Centro de excelencia Severo Ochoa Program SEV-2012-0249. This work was granted access to the HPC resources of the Gauss Center for Supercomputing at Forschungzentrum Jülich, Germany, made available within the Distributed European Computing Initiative by the PRACE-2IP, receiving funding from the European Community’s Seventh Framework Programme (FP7/2007-2013) under grant agreement RI-283493 (project PRA039) and ERC grant agreement No 279757.