Dear Viktor,
Please, find answer to your question:
Energy density of inflaton is distributed between ordinary and mirror particles in proportion to K and K'.
It determines temperature of ordinary and mirror matter at heating after inflation.
In the same way, in which we treated ratio of primordial neutrinos and photons you can deduce the temperatures of ordinary and mirror matter at 1 s of expansion (with the account for the change of number of species)
Regards
M.Yu.Khlopov