TY - JOUR
T1 - Off-shell suppression of renormalons in non-relativistic QCD boundstates
AU - Kiyo, Y.
AU - Sumino, Y.
N1 - Funding Information:
Y.K. was supported by the Japan Society for the Promotion of Science.
PY - 2002/5/23
Y1 - 2002/5/23
N2 - 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.
AB - 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.
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U2 - 10.1016/S0370-2693(02)01731-8
DO - 10.1016/S0370-2693(02)01731-8
M3 - Article
AN - SCOPUS:0037161996
VL - 535
SP - 145
EP - 154
JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
SN - 0370-2693
IS - 1-4
ER -