Heavy quark masses from sum rules in four-loop approximation Original Research Article

New data for the total cross section image in the charm and bottom threshold region are combined with an improved theoretical analysis, which includes recent four-loop calculations, to determine the short distance image charm and bottom quark masses. A detailed discussion of the theoretical and experimental uncertainties is presented. The final result for the image-masses, image and image, can be translated into image and image. This analysis is consistent with but significantly more precise than a similar previous study.