Astronomy

In current models of the Big Bang, what happens to the products of baryon annihilation?

In current models of the Big Bang, what happens to the products of baryon annihilation?


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In current thinking about the Big Bang, the baryogenesis phase involves CP/CPT symmetry violation. There is an excess (says Wikipedia) of perhaps 1 in $10^{10}$ baryons over antibaryons, the majority annihilate and some matter is left over.

That's all fine so far except - the energy output (gamma rays?) of annihilating something like $2 × 10^{10}$ times as much baryonic matter/antimatter as remained in the universe after baryogenesis, sounds like it should have lit up the early universe. But the models seem to skip over this, and the next thing we hear is the classic mass-energy distribution of around 63% dark energy, 23% dark matter, 4% baryonic matter.

Where did the vast production of high energy photon pairs (I guess?) from the annihilation phase, end up? What happens to them, in this model, at and after annihilation? Thinking of background neutrino/background microwave from other singular large-scale "creation-of-afterglow" Big Bang events, where are they now?



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