Spin Polarization and Chiral Symmetry Breaking at Finite Density

Chiral Symmetry Breaking in High Density QCD

We propose a symmetry breaking scheme for QCD with three massless quarks at high baryon density wherein the color and flavor SU(3)color×SU(3)L×SU(3)R symmetries are broken down to the diagonal subgroup SU(3)color+L+R by the formation of a condensate of quark Cooper pairs. We discuss general properties that follow from this hypothesis, including the existence of gaps for quark and gluon excitati...

Chiral Symmetry and Chiral Symmetry Breaking*

Lectures presented at the session on " Recent Developments in Quantum Field Theory and Statistical Mechanics " of the Les Houches Summer School of Theoretical Physics August 1982 *Nork supported by the

Chiral Symmetry Restoration in the Instanton Liquid at Finite Density

The properties of the QCD partition function at finite chemical potential are studied within the instanton liquid model. It is shown that the density dependence of the quarkinduced instanton-antiinstanton (I-A) interaction leads to the formation of topologically neutral I-A pairs (’molecules’), resulting in a first order chiral phase transition at a critical chemical potential μq ' 310 MeV. At ...

Chiral symmetry breaking and vacuum polarization in a bag

We study the effects of a finite quark mass in the hedgehog configuration in the two phase chiral bag model. We discuss the chiral properties, such as the fractional baryon number and the chiral Casimir energy, by using the Debye expansion for the analytical calculation and the Strutinsky’s smearing method for the numerical computation. It is shown that the fractional baryon number carried by m...

Testing Chiral Symmetry Breaking at DAΦNE