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Paper   IPM / Physic / 12297
School of Physics
  Title:   Gauge-flation Vs Chromo-Natural Inflation
  Author(s):  M.M. Sheikh-Jabbari
  Status:   Published
  Journal: Phys. Lett. B
  Vol.:  717
  Year:  2012
  Pages:   6
  Supported by:  IPM
  Abstract:
Gauge-flation, non-Abelian gauge field inflation, which was introduced in [1] and analyzed more thoroughly in [2], 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 [3] 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 [3] starts from a " small axion " region, while the trajectory considered in [1, 2] corresponds to a " large axion " region.

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