On renormalons of static QCD potential at u = 1/2 and 3/2

Yukinari Sumino, Hiromasa Takaura

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1 Citation (Scopus)

Abstract

We investigate the u= 1 / 2 [O(Λ QCD)] and u=3/2[O(ΛQCD3)] renormalons in the static QCD potential in position space and momentum space using the OPE of the potential-NRQCD effective field theory. This is an old problem and we provide a formal formulation to analyze it. In particular we present detailed examinations of the u = 3/2 renormalons. We clarify how the u = 3/2 renormalon is suppressed in the momentum-space potential in relation with the Wilson coefficient VA(r). We also point out that it is not straightforward to subtract the IR renormalon and IR divergences simultaneously in the multipole expansion. Numerical analyses are given, which clarify the current status of our knowledge on the perturbative series. The analysis gives a positive reasoning to the method for subtracting renormalons used in recent αs(MZ) determination from the QCD potential.

Original languageEnglish
Article number116
JournalJournal of High Energy Physics
Volume2020
Issue number5
DOIs
Publication statusPublished - 2020 May 1

Keywords

  • Perturbative QCD
  • Renormalization Regularization and Renormalons
  • Wilson
  • ’t Hooft and Polyakov loops

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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