Talk presented by Masahiro Fukushima

Parallel Session: Confinement I

Tuesday June 29th, 15.30 - 15.50, Fermi Room

Quark Confinement and Extended Monopole Clustering in the Multi-Instanton

Abstract: We study the string tension in the multi-instanton system using the SU(2) lattice with (10fm)$^4$ and $a$=0.05fm. We take the standard instanton-size destribution as $\rho^{-5}$ in the infrared region. From about 5*10$^6$ measurements of Wilson loops, we find the string tension about 0.4GeV/fm, when the average instanton size is taken to be 0.4fm. Quantitatively, the string tension strongly depends on the average instanton size as well as the instanton density. We investigate also the clustering of the extended monopoles in the maximally abelian gauge in the multi-instanton ensemble.

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