Four-loop moments of the heavy quark vacuum polarization function in perturbative QCD
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New results at four-loop order in perturbative QCD for the first two Taylor coefficients of the heavy quark vacuum polarization function are presented. They can be used to perform a precise determination of the charm- and bottom-quark mass. Implications for the value of the quark masses are briefly discussed.
8 pages, 13 figures; final version accepted for publication in the journal
8 pages, 13 figures; final version accepted for publication in the journal