Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2008-07-23
JHEP 0901:015,2009
Physics
High Energy Physics
High Energy Physics - Phenomenology
53 pages, 20 figures. Figures reformatted, minor changes in Section 3, references added
Scientific paper
10.1088/1126-6708/2009/01/015
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 $\lambda_\phi = 0$ 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 $m_\axino \sim 1$ to $10 \GeV$ and is typically over-produced during the flaton decay. Interestingly though, the dark matter abundance is minimized for $m_\axino \sim 1 \GeV$, $f_a \sim 10^{11}$ to $10^{12} \GeV$ and $|\mu| \sim 400 \GeV$ 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.
Kim Seongcheol
Park Wan-Il
Stewart Ewan D.
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