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Correlated curvature perturbations and magnetogenesis from the GUT gauge bosons

Research output: Contribution to journalJournal article

<mark>Journal publication date</mark>02/2013
<mark>Journal</mark>Astroparticle Physics
Number of pages4
Pages (from-to)86-89
<mark>Original language</mark>English


In the context of hybrid inflation at the scale of grand unification, it is shown that, if (some of) the gauge bosons of the unbroken grand unified group obtain a flat superhorizon spectrum of perturbations from inflation they can affect or even generate the observed curvature perturbation and simultaneously produce a sizable primordial magnetic field capable of explaining galactic magnetism. The mechanism employs the vector curvaton idea for a supermassive grand unified gauge boson after the breaking of grand unification.