In ( ( 1 ) ) we introduced an inflationary scenario , non-abelian gauge field inflation or gauge-flation for short , in which slow-roll inflation is driven by non-Abelian gauge field minimally coupled to gravity .
We present a more detailed analysis , both numerical and analytical , of the gauge-flation .
By studying the phase diagrams of the theory , we show that getting enough number of e-folds during a slow-roll inflation is fairly robust to the choice of initial gauge field values .
In addition , we present a detailed analysis of the cosmic perturbation theory in gauge-flation which has many special and interesting features compared the standard scalar-driven inflationary models .
The specific gauge-flation model we study in this paper has two parameters , a cutoff scale \Lambda and the gauge coupling g .
Fitting our results with the current cosmological data fixes \Lambda \sim 10 H \sim 10 ^ { 15 } GeV ( H is the Hubble parameter ) and g \sim 10 ^ { -4 } , which are in the natural range of parameters in generic particle physics beyond standard models .
Our model also predicts a tensor-to-scalar ratio r > 0.05 , in the range detectable by the Planck satellite .