After the Big Bang, there must have been an imbalance in the amount of matter and antimatter, which would have caused what's known as baryogenesis
- the birth of matter.
Cosmology can also present ways of testing predictive neutrino mass models in leptogenesis  and even baryogenesis
At some point an unknown reaction called baryogenesis
violated the conservation of baryon number, leading to a very small excess of quarks and leptons over antiquarks and antileptons--of the order of one part in 30 million.
Spergel, "Chern-Simons inflation and baryogenesis
," Journal of Cosmology and Astroparticle Physics, vol.2013, 2013.
Of course the EM radiation term [[OMEGA].sub.r] is non-zero but small and determines the expansion during the baryogenesis
initial phase, as does the spatial dynamics expansion term because of the [alpha] dependence.
Pilaftsis, "CP violation and baryogenesis
due to heavy Majorana neutrinos," Physical Review D: Particles, Fields, Gravitation and Cosmology, vol.
We want to emphasize that the conventional scenario of electroweak baryogenesis
does not take into account gravitational effects.
Unsolved mysteries include the predicted existence of a space-time singularity in the very beginning of the Universe, the "graceful-exit" from primordial inflation, the baryogenesis
problem, that is, the matter-antimatter asymmetry, and the cosmic coincidence problem.
Pati, "Advantages of unity with SU(4)-color: Reflections through neutrino oscillations, baryogenesis
and proton decay," International Journal of Modern Physics A, vol.
From the phenomenological point of view, the Minimal Supersymmetric Standard Model (MSSM) contains all the necessary ingredients for successful baryogenesis
and provides a framework for cosmic inflation.
Riva, "Electroweak baryogenesis
in non-minimal composite Higgs models," Journal of Cosmology and Astroparticle Physics, vol.
Trodden, "Electroweak baryogenesis
: a brief review," in Proceedings of the 33rd Rencontres de Moriond 98 Electrowek Interactions and Unified Theories: Les racs, vol.