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Paper   IPM / P / 11225
School of Physics
  Title:   Inflation from Charged Scalar and Primordial Magnetic Fields?
1.  R. Emami
2.  H. Firouzjahi
3.  M. Sadegh Movahed
  Status:   Published
  Journal: Phys. Rev. D
  Vol.:  81
  Year:  2010
  Pages:   083526
  Supported by:  IPM
A model of inflation is presented where the inflaton field is a complex scalar field coupled to a U(1) gauge field. Due to the axial symmetry of the potential, the inflation is driven by the radial direction while the angular field is gauged by U(1). Due to the coupling of the inflaton to the gauge field, a time dependent mass term for the gauge field is generated dynamically and conformal invariance is broken. We study whether a significant amount of primordial magnetic fields can be generated during inflation by allowing a time-dependent U(1) gauge kinetic coupling.

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