Lattice QCD study of the heavy-heavy-light quark potential
- Faculty of Science, Kyoto University, Kitashirakawa, Sakyo, Kyoto 606-8502 (Japan)
We study the heavy-heavy-light quark (QQq) potential in SU(3) quenched lattice QCD, and discuss one of the roles of the finite-mass valence quark in the interquark potential. Monte Carlo simulations are performed with the standard gauge action on the 16{sup 4} lattice at {beta}=6.0 and the O(a)-improved Wilson fermion action at four hopping parameters. For statistical improvement, the gauge configuration is fixed with the Coulomb gauge. We calculate the potential energy of QQq systems as a function of the inter-heavy-quark distance R in the range of R{<=}0.8 fm. The QQq potential is well described with a Coulomb plus linear potential, and the effective string tension between the two heavy quarks is significantly smaller than the string tension {sigma}{approx_equal}0.89 GeV/fm. It would generally hold that the effect of the finite-mass valence quark reduces the inter-two-quark confinement force in baryons.
- OSTI ID:
- 21250252
- Journal Information:
- Physical Review. D, Particles Fields, Vol. 78, Issue 1; Other Information: DOI: 10.1103/PhysRevD.78.014513; (c) 2008 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2821
- Country of Publication:
- United States
- Language:
- English
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