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 λφ = 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 mã ∼ 1 to 10 GeV and is typically over-produced during the flaton decay. Interestingly though, the dark matter abundance is minimized for mã ∼ 1 GeV, fa ∼ 1011 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. 1 ar X iv :0 80 7. 36 07 v2 [ he pph ] 4 N ov 2 00 8