Off-shell suppression of renormalons in non-relativistic QCD boundstates

Y. Kiyo, Y. Sumino

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

We study an effect of the off-shellness of the quark and antiquark inside a heavy quarkonium system on IR renormalons contained in the perturbative computations of the quarkonium energy levels. We demonstrate that, when the off-shellness P 2 Q - m 2 Q ∼ α 2 Sm 2 Q is larger than m Q Λ QCD, renormalons in the energy levels as calculated in perturbative QCD are suppressed by a factor Λ QCD/(α 2 Sm Q) as compared to those in 2m pole + V QCD(r). In this case the residual O(Λ QCD renormalon has the same dimension as that of the leading gluon-condensate contribution.

Original languageEnglish
Pages (from-to)145-154
Number of pages10
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume535
Issue number1-4
DOIs
Publication statusPublished - 2002 May 23

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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