Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2003-03-18
JHEP 0305 (2003) 057
Physics
High Energy Physics
High Energy Physics - Phenomenology
34 pages including 6 figures, uses JHEP3.cls, version to appear in JHEP
Scientific paper
10.1088/1126-6708/2003/05/057
A simple extension of the minimal supersymmetric standard model which naturally and simultaneously solves the strong CP and mu problems via a Peccei-Quinn and a continuous R symmetry is considered. This model is supplemented with hybrid inflation and leptogenesis, but without taking the specific details of these scenarios. It is shown that the Peccei-Quinn field can successfully act as a curvaton generating the total curvature perturbation in the universe in accord with the cosmic background explorer measurements. A crucial phenomenon, which assists us to achieve this, is the "tachyonic amplification" of the perturbation acquired by this field during inflation if the field, in its subsequent evolution, happens to be stabilized for a while near a maximum of the potential. In this case, the contribution of the field to the total energy density is also enhanced ("tachyonic effect"), which helps too. The cold dark matter in the universe consists, in this model, mainly of axions which carry an isocurvature perturbation uncorrelated with the total curvature perturbation. There are also lightest sparticles (neutralinos) which, like the baryons, originate from the inflationary reheating and, thus, acquire an isocurvature perturbation fully correlated with the curvature perturbation. So, the overall isocurvature perturbation has a mixed correlation with the adiabatic one. It is shown that the presently available bound on such an isocurvature perturbation from cosmic microwave background radiation and other data is satisfied. Also, the constraint on the non-Gaussianity of the curvature perturbation obtained from the recent Wilkinson microwave anisotropy probe data is fulfilled thanks to the "tachyonic effect".
Dimopoulos Konstantinos
Lazarides George
Lyth David
Ruiz de Austri Roberto
No associations
LandOfFree
The Peccei-Quinn Field as Curvaton does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with The Peccei-Quinn Field as Curvaton, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The Peccei-Quinn Field as Curvaton will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-118593