Mixed inflaton and curvaton perturbations

Details Mixed inflaton and curvaton perturbations Mixed inflaton and curvaton perturbations

2004-03-11

arxiv.org/abs/astro-ph/0403258v2

Phys.Rev. D70 (2004) 063522

Astronomy and Astrophysics

Astrophysics

28 pages, accepted for Phys. Rev. D

Scientific paper

10.1103/PhysRevD.70.063522

A recent variant of the inflationary paradigm is that the ``primordial'' curvature perturbations come from quantum fluctuations of a scalar field, subdominant and effectively massless during inflation, called the ``curvaton'', instead of the fluctuations of the inflaton field. We consider the situation where the primordial curvature perturbations generated by the quantum fluctuations of an inflaton and of a curvaton field are of the same order of magnitude. We compute the curvature perturbation and its spectrum in this case and we discuss the observational consequences.

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