Orateur
Dr
Joern Kersten
(University of Hamburg)
Description
The entropy produced in the decays of super-weakly interacting particles may help to reconcile thermal leptogenesis and Big Bang Nucleosynthesis (BBN) in scenarios with gravitino dark matter, which is usually difficult due to late decays of the next-to-lightest supersymmetric particle (NLSP) spoiling BBN. We study this possibility for a general neutralino NLSP. We discuss the constraints on the entropy-producing particle, considering as an example the saxion from the axion multiplet. We show that, in addition to enabling a solution of the strong CP problem, it can indeed produce a suitable amount of entropy.
Authors
M.
Jasper Hasenkamp
(University of Hamburg)
Dr
Joern Kersten
(University of Hamburg)
