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Charm Current-Current Correlators in Twisted Mass Lattice QCD

The current correlator method has been shown to be a practical tool to extract the charm quark mass and strong coupling constant from Lattice QCD data as an alternative to the sum rule approach using experimental electron-positron annihilation cross section data. We report on the progress of an investigation of charm current-current correlators in N_f=2 Twisted Mass Lattice QCD. Upon determining the temporal moments of the current correlators we compare to the low-energy expansion of the moments in perturbative QCD and calculate the charm quark mass and strong coupling constant and in case of the vector current correlator directly compare both methods.

preprint2011arXivOpen access
Karl JansenMarcus PetschliesCarsten Urbach
hep-lat
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Karl JansenMarcus PetschliesCarsten Urbach

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