Reaction rate and Hubble parameter in early universe

[Magister]

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?

 

[hellfire]

On a very general level, without much detail, see slides 9 to 12 of:
www.mpia-hd.mpg.de/homes/rix/CMB_Lect.pdf

 

[Magister]

Thanks. But I need something more detailed...

 

[hellfire]

A great reference for the early universe is the book by Kolb & Turner: https://www.amazon.com/dp/0201626748/?tag=pfamazon01-20