Matter-Antimatter Asymmetry Of The Universe and Baryon Formation From Non-Equilibrium Quarks and Gluons

Abstract

Baryon number violation, CP violation and non-equilibrium evolution of the early universe just after the big bang are proposed in the literature to be necessary conditions to explain the observed matter-antimatter asymmetry (baryon asymmetry) of the universe. Since the free quarks are not observed and the baryons are formed by the confinement of quarks and gluons, it is necessary to understand how the baryons were formed for the first time from the non-equilibrium quarks and gluons in the early universe just after the big bang in order to study the baryon asymmetry of the universe. In this paper we study the baryon formation from the non-equilibrium quarks and gluons in the early universe just after the big bang from the first principle in QCD by using the closed-time path integral formalism in non-equilibrium QCD.