Test of the Kugo-Ojima Confinement Criterion in the Lattice Landau Gauge

Abstract

We present the first results of numerical test of the Kugo-Ojima confinement criterion in the lattice Landau gauge. The Kugo-Ojima criterion of colour confinement in the BRS formulation of the continuum gauge theory is given by $u_b^a(p^2)=-{\delta }_b^a$, where $u_b^a$ is defined by the two point function of the Faddeev-Popov ghost fields $c,\bar{c}$ and the gauge field $A_{\mu }$. We measured the lattice version of $u_b^a(0)$ in use of $1/(-\partial D(A))$ where $D_{\mu }(A)$ is a lattice covariant derivative in the new definition of the gauge fields as $U=e^A$. We obtained that $u_b^a(0)$ is consistent with $-c{\delta }_b^a,c=0.7$ in SU(3) quenched simulation data of $\beta =5.5$ on $8^4$ and $12^4$. We report the $\beta$ dependence and finite-size effect of c.

Comments: 3 pages Latex, 2 eps figures, Talk given at Lattice99(confine), Pisa, Italy