This can be seen in Figure 9, where the efficiency factor κ falls off rapidly for MR1 > TRH .
Theory of Neutrinos: A White Paper
In the so-called ‘strong washout’ regime, TRH can be an order of magnitude smaller than M1 [185].
Theory of Neutrinos: A White Paper
Unstable gravitinos with masses below ∼ 10 TeV lead to severe constraints on the reheat temperature TRH [204] which are in conflict with thermal leptogenesis where TRH >∼ 109 GeV.
Theory of Neutrinos: A White Paper
However, the ‘overclosure’ constraint leads to TRH <∼ (109 − 1010 ) GeV.
Theory of Neutrinos: A White Paper
Here we have used the expression for the radiation entropy S (tRH ) = T 3 RH a3 (tRH ).
Cosmological Entropy Bounds
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