Physics – High Energy Physics – High Energy Physics - Lattice
Scientific paper
2005-12-28
Phys.Lett. B621 (2005) 171-175
Physics
High Energy Physics
High Energy Physics - Lattice
Scientific paper
10.1016/j.physletb.2005.06.053
We study the QCD color interactions between static two heavy quarks at zero temperature in a quenched SU(3) lattice gauge simulation: in addition to the standard singlet $q\bar{q}$ potentials, we calculate octet $q\bar{q}$ potentials, symmetric and antisymmetric $qq$ potentials. It is shown that the antisymmetric $qq$ channel behaves as a linearly rising potential at large quark separations. We further find that the $q\bar{q}$ octet and $qq$ symmetric channels have the complex dependence on the distance; at short distances they are repulsive forces, while at large distances, they show linearly rising feature. Ratio of string tensions between $q\bar{q}$ singlet and $qq$ antisymmetric potentials is described in terms of the Casimir factor.
Nakamura Akihiro
Saito Takesi
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