Non-Abelian Gauge Field Inflation

By A. Maleknejad, M. Sheikh-Jabbari. 2011

197 citations recorded by the source corpus.

In [arXiv:1102.1513] 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.

Subfields: Astronomy and Astrophysics, Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/3179a33df2f78c6fec3017ed734b22b41eba7def

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In Astronomy and Astrophysics

  1. Jiro Soda
  2. M. Sheikh-Jabbari
  3. A. Maleknejad
  4. E. Komatsu
  5. Peter Adshead
  6. E. Martinec
  7. Mark Wyman
  8. Xingang Chen

In Nuclear and High Energy Physics

  1. Jiro Soda
  2. E. Komatsu
  3. A. Maleknejad
  4. M. Sheikh-Jabbari
  5. Peter Adshead
  6. E. Martinec
  7. Mark Wyman
  8. E. Silverstein

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