Dimopoulos, Konstantinos and Prokopec, Tomislav and Tornkvist, Ola and Davis, Anne-Christine (2002) Natural magnetogenesis from inflation. Physical Review D, 65 (6). ISSN 1550-7998Full text not available from this repository.
We consider the gravitational generation of the massive Z-boson field of the standard model, due to the natural breaking of its conformal invariance during inflation. The electroweak symmetry restoration at the end of inflation turns the almost scale-invariant superhorizon Z-spectrum into a hypermagnetic field, which transforms into a regular magnetic field at the electroweak phase transition. The mechanism is generic and is shown to generate a superhorizon spectrum of the form B~1/L on a length-scale L regardless of the choice of inflationary model. Scaled to the epoch of galaxy formation such a field suffices to trigger the galactic dynamo and explain the observed galactic magnetic fields in the case of a spatially flat, dark energy dominated Universe with GUT-scale inflation. The possibility of further amplification of the generated field by preheating is also investigated. To this end we study a model of Supersymmetric Hybrid Inflation with a Flipped SU(5) grand unified symmetry group.
|Journal or Publication Title:||Physical Review D|
|Subjects:||Q Science > QC Physics|
|Departments:||Faculty of Science and Technology > Physics|
|Deposited By:||Dr Konstantinos Dimopoulos|
|Deposited On:||19 Jan 2009 14:23|
|Last Modified:||08 May 2016 01:06|
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