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

Author(s)

Alcaniz, J. S. ^{[1, 2]} ; Carvalho, F. C. ^{[3, 1]} ; Silva, R. ^{[4, 5]} ; Lima, J. A. S. ^[6]

Affiliation

^[1] Observ Nacl, BR-20921400 Rio De Janeiro - Brazil

^[2] Inst Nacl Pesquisas Espaciais CRN, BR-59076740 Natal, RN - Brazil

^[3] Inst Nacl Pesquisas Espaciais, Div Astrofis, BR-12227010 Sao Jose Dos Campos, SP - Brazil

^[4] Univ Estado Rio Grande do Norte, Dept Fis PPGF, BR-59610210 Mossoro, RN - Brazil

^[5] Univ Fed Rio Grande do Norte, Dept Fis PPGF, BR-59072970 Natal, RN - Brazil

^[6] Univ Sao Paulo, BR-05508900 Sao Paulo - Brazil

• Document type: Journal article
• Source: EPL; v. 83, n. 2 2008.
• Web of Science Citations: 3

Abstract

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 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 (n(s)) and its running (dn(s)/d ln k) depend on the dimensionless parameter a multiplying the quadratic term in the potential. In the limit a. 0 all the results of the exponential potential are fully recovered. For values of alpha not equal 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. Copyright (C) EPLA, 2008. (AU)

• FAPESP's process: 04/13668-0 - Cosmology in the era of precision: dark energy, dark matter and background cosmic radiation
• Grantee: Jose Ademir Sales de Lima
• Support Opportunities: Research Projects - Thematic Grants