Exploring the Relation between \Gamma and H in the Early Universe

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The discussion focuses on understanding the relationship between the reaction rate (\Gamma) of primordial elements and the Hubble parameter (H) during the transition from the radiation-dominated era to the matter-dominated era in the early universe. Participants seek resources for a deeper understanding of this relationship, referencing specific slides from a presentation as a starting point. A recommended resource for further reading is the book by Kolb & Turner, which provides detailed insights into early universe cosmology. The conversation emphasizes the need for accessible yet comprehensive materials on this complex topic. Overall, the quest for knowledge about early universe dynamics continues to be a significant area of interest in cosmology.
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Does anyone know where I can learn more about the relation between the reaction rate ( \Gamma ) of the primordial elements and the Hubble parameter ( H ) at the early universe? Principaly at the transition from the radiation dominated era to the the matter dominated era?
 
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Thanks. But I need something more detailed...
 

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