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arXiv · 1203.2265

Gauge-flation Vs Chromo-Natural Inflation

M. M. Sheikh-Jabbari
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Abstract

Gauge-flation, non-Abelian gauge field inflation, which was introduced in arXiv:1102.1513 and analyzed more thoroughly in arXiv:1102.1932, is a model of inflation driven by non-Abelian gauge fields minimally coupled to Einstein gravity. In this model certain rotationally invariant combination of gauge fields play the role of inflaton. Recently, the chromo-natural inflation model was proposed arXiv:1202.2366 which besides the non-Abelian gauge fields also involve an axion field. In this short note we show that the model involving axions, indeed allows for various slow-roll trajectories for different values of its parameters: A specific trajectory discussed in arXiv:1202.2366 starts from a "small axion" region, while the trajectory considered in arXiv:1102.1513 corresponds to a "large axion" region.

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M. M. Sheikh-Jabbari. 2012-03-10. Gauge-flation Vs Chromo-Natural Inflation. https://doi.org/10.1016/j.physletb.2012.09.014

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