Volume 83, Number 2, July 2008
|Number of page(s)||5|
|Section||Geophysics, Astronomy and Astrophysics|
|Published online||02 July 2008|
CMB and LSS constraints on a single-field model of inflation
Observatório Nacional - 20921-400 Rio de Janeiro, RJ, Brasil
2 Instituto Nacional de Pesquisas Espaciais/CRN - 59076-740, Natal, RN, Brasil
3 Instituto Nacional de Pesquisas Espaciais, Divisão de Astrofísica - 12227-010, São José dos Campos, SP, Brasil
4 Universidade do Estado do Rio Grande do Norte, Departamento de Física - PPGF - 59610-210, Mossoró, RN, Brasil
5 Universidade Federal do Rio Grande do Norte, Departamento de Física - PPGF - 59072-970 Natal, RN, Brasil
6 Universidade de São Paulo - 05508-900 São Paulo, SP, Brasil
Accepted: 2 June 2008
A new inflationary scenario whose exponential potential has a quadratic dependence on the field Φ in addition to the standard linear term is confronted with the five-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 (ns) and its running (dns/d ln k) depend on the dimensionless parameter α multiplying the quadratic term in the potential. In the limit all the results of the exponential potential are fully recovered. For values of , 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.
PACS: 98.80.-k – Cosmology
© EPLA, 2008
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