Gribov-Zwanziger theory, Kugo-Ojima color confinement
& ghost and gluon propagators
講師： 近藤 慶一 氏 (千葉大)
日時：2009年10月23日(金） 17:00--
場所： B1207教室
概 要：We discuss how the existence of the Gribov horizon affects the deep infrared dynamics of SU(N) Yang-Mills theory in the Landau gauge. (1) We prove that the Faddeev-Popov-ghost dressing function is non-zero and finite in the limit of vanishing momentum and the ghost propagator behaves like free in the deep infrared regime. (2) The Kugo-Ojima color confinement criterion is not satisfied in its naive form u(0)=-1. Rather, we find u(0)=-2/3. (3) We give a nilpotent BRST like symmetry in the Gribov-Zwanziger theory.
