Lattice QCD study of the heavy-heavy-light quark potential

Journal Article · Tue Jul 01 04:00:00 EDT 2008 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.78.014513· OSTI ID:21250252

Yamamoto, Arata; Suganuma, Hideo; Iida, Hideaki ^[1]

---

1. 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, Journal Name: Physical Review. D, Particles Fields Journal Issue: 1 Vol. 78; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BAG MODEL
BARYONS
COMPUTERIZED SIMULATION
CONFIGURATION
GEV RANGE
LATTICE FIELD THEORY
MASS
MONTE CARLO METHOD
POTENTIALS
QUANTUM CHROMODYNAMICS
QUARKS
SU-3 GROUPS