DBI with Primordial Magnetic Field in the Sky

Details DBI with Primordial Magnetic Field in the Sky DBI with Primordial Magnetic Field in the Sky

2005-09-03

arxiv.org/abs/hep-th/0509032v2

JHEP 0509 (2005) 004

Physics

High Energy Physics

High Energy Physics - Theory

12 pages, no figure, typos corrected

Scientific paper

10.1088/1126-6708/2005/09/004

In this paper, we study the generation of a large scale magnetic field with amplitude of order $\mu$G in an inflationary model which has been introduced in hep-th/0310221. This inflationary model based on existence of a speed limit for inflaton field. Generating a mass for inflaton at scale above the $\phi_{IR}$, breaks the conformal triviality of the Maxwell equation and causes to originate a magnetic field during the inflation. The amplitude strongly depends on the details of reheating stage and also depends on the e-foldings parameter N. We find the amplitude of the primordial magnetic field at decoupling time in this inflationary background using late time behavior of the theory.

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