Colorflavor locking and chiral symmetry breaking in high density QCD
Abstract
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 excitations, the existence of NambuGoldstone bosons which are excitations of the diquark condensate, and the existence of a modified electromagnetic gauge interaction which is unbroken and which assigns integral charge to the elementary excitations. We present meanfield results for a Hamiltonian in which the interaction between quarks is modeled by that induced by singlegluon exchange. We find gaps of order 10100 MeV for plausible values of the coupling. We discuss the effects of nonzero temperature, nonzero quark masses and instantoninduced interactions on our results.
 Publication:

Nuclear Physics B
 Pub Date:
 January 1999
 DOI:
 10.1016/S05503213(98)006683
 arXiv:
 arXiv:hepph/9804403
 Bibcode:
 1999NuPhB.537..443A
 Keywords:

 High Energy Physics  Phenomenology;
 High Energy Physics  Lattice;
 Nuclear Theory
 EPrint:
 17 pages, LaTeX. Factors of 2 corrected, figs and tables updated accordingly