# Early Universe

1. Feb 21, 2007

### 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?

Last edited: Feb 21, 2007
2. Feb 21, 2007

### hellfire

3. Feb 21, 2007

### Magister

Thanks. But I need something more detailed...

4. Feb 22, 2007

### hellfire

A great reference for the early universe is the book by Kolb & Turner: The Early Universe