Lattice QCD study of three quark potential

摘要

We study the static three quark potential using lattice QCD simulation. At zero temperature, three quark potential is extracted from the baryonic Wilson loop making use of the smearing technique which enhances the ground state contribution. The potential is fitted to the phenomenological form, the sum of the Coulomb term, linearly rising term and the constant. We compare two types of the linear term, "Y" and "Δ" type, and find that the string tension almost coincide with σ_(QQ) in the former case. We also investigate the three quark potential at finite temperature using the Polyakov loop correlation. In the deconfining phase, the screened potential is observed similarly to the case of QQ system.