Speaker
Description
We examine a pattern of dynamical chiral symmetry breaking making use of the vacuum energy density as a function of the quark condensate. We compute the vacuum energy density and the quark condensate in the interacting instanton liquid model (IILM) with three-flavor quarks, which is a phenomenological model to describe the QCD vacuum. These computations are performed by using a numerical simulation of the canonical IILM, i.e., the number of instantons and anti-instantons are fixed. We find that chiral symmetry is broken in the chiral (U(1)_A) anomaly assisted way in the IILM with three-flavor dynamical quarks. Comparing the full and the quenched IILM calculations, we also find the instanton-quark interaction included in the IILM plays a crucial role for the chiral symmetry breaking.
