Strong CP problem, Neutron EDM and Thermal QCD sum rules

Mohamed Chabab
2004 AIP Conference Proceedings  
The behaviour of the broken CP symmetry at finite temperature is examined. This is achieved through the investigation of the neutron electric dipole moment d_n induced by θ-term. By using thermal QCD sum rules, we find that below the critical temperature, the ratio |d_n θ̅| slightly decreases but survives at temperature effects. This evolution implies that CP remains broken at finite temperature as required by Baryogenesis Chabab.
doi:10.1063/1.1799782 fatcat:lkgce5ad6jejhl5gjlmvngnaqm