Stable Chromomagnetic QCD Vacuum and Confinement

Abstract

The stable chromomagnetic vacuum for SU(2) Yang-Mills theory found earlier is shown to give a model for confinement in QCD, using Wilson loop, and a linear potential (in the leading order) for quark-antiquark interaction. The coefficient $k$ in this potential is found to be $\sim 0.25 GeV^2$, in satisfactory agreement with non-relativistic potential model calculations for charmonium. At finite temperature, the real effective energy density found earlier is used to obtain estimates of the deconfining temperature agreeing reasonably with lattice study for SU(2).

Talk delivered at the conference on 'Strong Interactions in the 21st Century', held at the Tata Institute of Fundamental Research, Mumbai, Feb. 10 - 12, 2010