## Early Universe

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?
 Blog Entries: 9 Recognitions: Science Advisor On a very general level, without much detail, see slides 9 to 12 of: www.mpia-hd.mpg.de/homes/rix/CMB_Lect.pdf
 Thanks. But I need something more detailed...

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