Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2004-04-28
JHEP0410:022,2004
Physics
High Energy Physics
High Energy Physics - Theory
one reference added
Scientific paper
10.1088/1126-6708/2004/10/022
In this note we demonstrate that chaotic inflation can naturally be realized in the context of an anomaly free minimal gauged supergravity in D=6 which has recently been the focus of some attention. This particular model has a unique maximally symmetric ground state solution, $R^{3,1} \times S^2$ which leaves half of the six-dimensional supersymmetries unbroken. In this model, the inflaton field $\phi$ originates from the complex scalar fields in the D=6 scalar hypermultiplet. The mass and the self couplings of the scalar field are dictated by the D=6 Lagrangian. The scalar potential has an absolute munimum at $\phi = 0$ with no undetermined moduli fields. Imposing a mild bound on the radius of $S^2$ enables us to obtain chaotic inflation. The low eenrgy equations of motion are shown to be consistent for the range of scalar field values relevant for inflation.
Brandenberger Robert H.
Randjbar-Daemi Seif
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