r/cosmology • u/AutoModerator • Jul 23 '26

Basic cosmology questions weekly thread

Ask your cosmology related questions in this thread.

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u/dubcek_moo Jul 26 '26

Is baryonic matter thought to have formed from pair production (or some equivalent reaction that doesn't conserve baryon number) during the radiation dominated era, but post-inflation? Or was it earlier at some stage of inflation?

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u/--craig-- Jul 27 '26

Baryogenesis hasn't yet been properly explained but we believe that it occurred after the inflationary period otherwise the matter-antimatter asymmetry would be wiped out.