Using some numbers from the above reference, "The results also slightly boosted the amount of dark matter in the universe — up to 26.8 percent — and more normal matter, up to 4.9 percent."
This gives me a slightly refined Equation of the Universe:
y = sin(x) + 0.240
This yields an area under the curve that is 68.3 percent positive, and 31.7 percent negative. The former represents the dark energy in the universe. Of the latter, about 11/13ths (or 26.8 percent) represents dark matter, and about 2/13ths (or 4.9 percent) represents ordinary matter.
I would guess that there were originally equal energy-equivalent amounts of dark energy and dark matter, in the form of spacetime curvature, and there was no vertical translation of the curve. In other words, no expansion, no contraction, no ordinary matter, and a lot more spacetime curvature than there is now.
To expand (pun intended) upon this idea, about 13.7 billion years ago, something happened that converted some of the energy of dark matter into ordinary matter (protons, neutrons, electrons). The curve shifted upward, and the spacetime curvature caused by dark matter decreased. Inflation ensued.
Ordinary matter apparently only causes 2/11ths as much spacetime curvature as dark matter. This hypothesis suggests that ordinary matter actually decreases the curvature of spacetime, rather than increases it. Retaining only 2/11ths as much as there was prior to baryogenesis. Most of the mass-energy of curved space is transformed into protons, neutrons, and electrons, thus leaving only a small amount of curved space, and a very weak gravitational force (relative to the other forces).
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