Higher Moments of Heavy Quark Vacuum Polarization
K. G. Chetyrkin, J. H. Kühn, M. Steinhauser
Abstract
We present analytical calculation of the first seven moments of the heavy quark vacuum polarization function in the three-loop order. The obtained results are compared against the asymptotic formulas following from the threshold singularities. We also discuss the μ dependence of the moments within the BLM procedure.
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