Static $\bar{Q}$-$Q$ Potential from $N_f=2$ Dynamical Domain-Wall QCD

Abstract

We calculate the static quark and anti-quark potential both in quenched and two-flavor dynamical quark lattice QCD using DBW2 gauge and domain-wall quark actions. Lattice spacings from Sommer scale are determined. We find (i) mixing of excited states is different in between quenched and dynamical, (ii) lattice spacing $a_{r_0}\sim a_{m_ρ}$ in dynamical and (iii) coefficient of Coulomb term being $α_{N_f=0}<α_{N_f=2}$ at $a^{-1}\sim$ 2 GeV.