Comparison of doubleinflationary models with observations
Abstract
We consider doubleinflationary models with two noninteracting scalar fields: a ``light'' scalar field φ_{l} with the potential 1/2m^{2}_{l}φ^{2}_{l} and a ``heavy'' scalar field φ_{h} with the potential λ/nφ^{n}_{h}, n=2,4, whose effective mass is larger than m_{l} during inflation with φ_{h}>M_{P}. Cold dark matter (CDM) with the initial spectrum of adiabatic perturbations produced in these models is compared with observations. These models contain two more free parameters than the standard CDM model with an initial scaleinvariant spectrum. We normalize our spectra to the COBE DMR and compare the predictions with observations on the biasing factor, largescale peculiar velocities, quasar and galaxy formation, and the StromloAPM countsincells analysis. The model with n=4 is excluded by the data while for the n=2 model, taking cosmic variance into account, a small window of parameters compatible with observations is found.
 Publication:

Physical Review D
 Pub Date:
 October 1994
 DOI:
 10.1103/PhysRevD.50.4827
 arXiv:
 arXiv:astroph/9403037
 Bibcode:
 1994PhRvD..50.4827P
 Keywords:

 98.80.Cq;
 95.35.+d;
 98.80.Es;
 Particletheory and fieldtheory models of the early Universe;
 Dark matter;
 Observational cosmology;
 Astrophysics;
 General Relativity and Quantum Cosmology
 EPrint:
 15 pages LaTeXREVTeX, 3 figures available upon request, DAMTPR94/20, YITP/U946