Relation between QCD potentials in momentum and position space

M. Jezabek, M. Peter, Y. Sumino

Research output: Contribution to journalArticlepeer-review

22 Citations (Scopus)


We derive a formula which relates the QCD potentials in momentum space and in position space in terms of the β function of the renormalization-group equation for the potential. This formula is used to study the theoretical uncertainties in the potential and in particular in its application to the determination of the pole mass mb when we use perturbative expansions. We demonstrate the existence of these uncertainties for the Richardson potential explicitly and then discuss the limited theoretical accuracy in the perturbative QCD potential. We conclude that a theoretical uncertainty of mb much below 100 MeV would not be achievable within perturbative QCD.

Original languageEnglish
Pages (from-to)352-358
Number of pages7
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Issue number3-4
Publication statusPublished - 1998 Jun 4


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