Heavy–heavy–light quark potential in SU(3) lattice QCD

摘要

We perform the first study for the heavy–heavy–light quark (QQq) potential in SU(3) quenched latticeQCD with the Coulomb gauge. The calculations are done with the standard gauge and O(a)-improvedWilson fermion action on the 164 lattice at β = 6.0. We calculate the energy of QQq systems as the functionof the distance R between the two heavy quarks, and find that the QQq potential is well describedwith a Coulomb plus linear potential form up to the intermediate distance R 0.8 fm. Compared to thestatic three-quark case, the effective string tension between the heavy quarks is significantly reduced bythe finite-mass valence quark effect. This reduction is considered to be a general property for baryons.