Compactification driven Hilltop Inflation in Einstein-Yang-Mills

Details Compactification driven Hilltop Inflation in Einstein-Yang-Mills Compactification driven Hilltop Inflation in Einstein-Yang-Mills

2009-12-17

arxiv.org/abs/0912.3349v2

Phys.Rev.D81:083504,2010

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

Title modification, typos corrected, published version

Scientific paper

10.1103/PhysRevD.81.083504

Starting from Einstein-Yang-Mills in higher dimensions with an instanton on a compact sphere, we dimensionally reduce to find an effective four-dimensional action describing "hilltop" inflation. Using recent CMB data, we analyse the parameter space of this model to search for viable set-ups. One unique feature of this class of inflationary models is that the value of the inflaton field, or alternatively, the size of the compact sphere, is stabilised dynamically during the inflationary process.

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