High Energy Theory Lunchtime Seminar

We propose a simple extension of the Minimal Supersymmetric Standard Model which gives rise to thermal inflation, baryogenesis and dark matter in a natural and remarkably consistent way. We consider the λ_φ = 0 special case of our previous model, which is the minimal way to incorporate a Peccei-Quinn symmetry. The axino becomes the lightest supersymmetric particle with $m_{\tilde{a}} \sim 1 \textrm{ to } 10 \GeV$ and is typically over-produced during the flaton decay.
Interestingly though, the dark matter abundance is minimized for , $f_a \sim 10^{11} \textrm{ to } 10^{12} \GeVand |\mu| \sim 400 \GeV \textrm{ to } 1 \TeV$ 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.
As an observable, thermal inflation which is the key idea of the model produces a background of gravitational waves.
It is likely to be detected at BBO and DECIGO style direct detection experiments.