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

Y. Kiyo, Y. Sumino

研究成果: Article査読

3 被引用数 (Scopus)

抄録

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.

本文言語English
ページ(範囲)145-154
ページ数10
ジャーナルPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
535
1-4
DOI
出版ステータスPublished - 2002 5 23

ASJC Scopus subject areas

  • 核物理学および高エネルギー物理学

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