Thermal inflation, baryogenesis and axions

In a previous paper, we proposed a simple extension of the Minimal Supersymmetric Standard Model which gives rise to thermal inflation and baryogenesis in a natural and remarkably consistent way. In this paper, we consider the λ_φ = 0 special case of our model, which is the minimal way to incorporate a Peccei-Quinn symmetry. The axino/flatino becomes the lightest supersymmetric particle with m ∼ 1 to 10 GeV and is typically over-produced during the flaton decay. Interestingly though, the dark matter abundance is minimized for m ∼ 1 GeV, f_a ∼ 10 ¹¹ to 10¹² GeV and |μ| ∼ 400 GeV to 2 TeV at an abundance coincident with the observed abundance and with significant amounts of both axions and axinos. Futhermore, for these values the baryon abundance naturally matches the observed abundance.