QCD Confinement and Theta Vacuum: Dynamical Spontaneous Symmetry Breaking

Abstract

This study proposes that the longstanding problems of quantum chromodynamics (QCD) as an SU(3)_C gauge theory, the confinement mechanism and Θvacuum, can be resolved by dynamical spontaneous symmetry breaking (DSSB) through the condensation of singlet gluons and quantum nucleardynamics (QND) as an SU(2)_N x U(1)_Z gauge theory is produced. The confinement mechanism is the result of massive gluons and the Yukawa potential provides hadron formation. The evidences for the breaking of discrete symmetries (C, P, T, CP) during DSSB appear explicitly: baryons and mesons without their parity partners, the conservation of vector current and the partial conservation of the axial vector current, the baryon asymmetry δ_B \simeq 10^{-10}, and the neutron electric dipole moment Θ< 10^{-9}. Hadron mass generation mechanism is suggested in terms of DSSB due to the Θvacuum.