Please explain the significance of the mass energy of particles in governing the reactions that could take place as the mean energy per particle available in the Universe decreased. In addition to this suggest reasons why matter may have come to dominate in the Universe as we know it today.
I know that the dominance of matter in the universe rather than anti matter gives the Universe its structure as we know it today. However 10^(-11)s after the big bang the universe would have consisted of approximately equal number of particles and antiparticles.
This solution presents an easy-to-understand description of the processes that occurred in the universe between 10^(-11)s and 10s of the big bang. It describes the processes leading to the formation of protons, neutrons and electrons, explains why matter (and not anti-matter) has come to dominate the universe today. and also the significance of mass energy in governing the reactions that could take place as the mean energy per particle available in the Universe decreased.