CMB and LSS constraints on a single-field model of inflation

Details CMB and LSS constraints on a single-field model of inflation CMB and LSS constraints on a single-field model of inflation

2007-04-23

arxiv.org/abs/0704.3043v1

Europhys.Lett.83:29001,2008

Astronomy and Astrophysics

Astrophysics

5 pages, 4 figures, LaTeX

Scientific paper

10.1209/0295-5075/83/29001

A new inflationary scenario whose exponential potential $V(\Phi)$ has a quadratic dependence on the field $\Phi$ in addition to the standard linear term is confronted with the tree-year observations of the Wilkinson-Microwave Anisotropy Probe and the Sloan Digital Sky Survey data. The number of e-folds ($N$), the ratio of tensor-to-scalar perturbations ($r$), the spectral scalar index of the primordial power spectrum ($n_s$) and its running ($dn_s/d\ln k$) depend on the dimensionless parameter $\alpha$ multiplying the quadratic term in the potential. In the limit $\alpha \to 0$ all the results of the standard exponential potential are fully recovered. For values of $\alpha \neq 0$, we find that the model predictions are in good agreement with the current observations of the Cosmic Microwave Background (CMB) anisotropies and Large-Scale Structure (LSS) in the Universe.

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