Possible effects of quark and gluon condensates in heavy quarkonium spectra

Journal Article · Mon Jul 01 04:00:00 EDT 1996 · Physical Review, D

DOI:https://doi.org/10.1103/PhysRevD.54.1136· OSTI ID:285810

Ding, Y B; Guo, X H; Li, X Q; Shen, P N ^[1]

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1. China Center of Advanced Science and Technology (World Laboratory), P.O. Box 8730, Beijing 100080 (China)

The Cornell potential with the best fitted parameters {alpha}{sub {ital s}} and {kappa} are modified by adding terms derived from nonperturbative QCD, which are characterized by a series of nonvanishing vacuum condensates of quarks and gluons. In terms of this potential, we study the system of heavy quarkonia. The results show that the correction caused by the additional terms reduces the deviation between the data and the values calculated with the pure Cornell potential and improves the splittings of energy levels. The achievements indicate that the nonperturbative effects induced by vacuum condensates play an important role for the correction to 1/{ital q}{sup 2}, which in general was phenomenologically put in by hand. This result would be helpful for understanding nonperturbative QCD along a parallel direction to the QCD sum rules. {copyright} {ital 1996 The American Physical Society.}

• OSTI ID: 285810
• Journal Information: Physical Review, D, Journal Name: Physical Review, D Journal Issue: 1 Vol. 54; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
CORRECTIONS
ENERGY LEVELS
GLUON CONDENSATION
POTENTIALS
QUANTUM CHROMODYNAMICS
QUARK CONDENSATION
QUARKONIUM
SUM RULES