Flat Tree-level Inflationary Potentials in Light of CMB and LSS Data

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dc.creatorBallesteros, G.
dc.creatorCasas, J. A.
dc.creatorEspinosa, J. R.
dc.creatorde Austri, R. Ruiz
dc.creatorTrotta, R.
dc.date2007-11-21
dc.date.accessioned2026-07-07T12:54:58Z
dc.date.available2026-07-07T12:54:58Z
dc.descriptionWe use cosmic microwave background and large scale structure data to test a broad and physically well-motivated class of inflationary models: those with flat tree-level potentials (typical in supersymmetry). The non-trivial features of the potential arise from radiative corrections which give a simple logarithmic dependence on the inflaton field, making the models very predictive. We also consider a modified scenario with new physics beyond a certain high-energy cut-off showing up as non-renormalizable operators (NRO) in the inflaton field. We find that both kinds of models fit remarkably well CMB and LSS data, with very few free parameters. Besides, a large part of these models naturally predict a reasonable number of e-folds. A robust feature of these scenarios is the smallness of tensor perturbations (r < 10^{-3}). The NRO case can give a sizeable running of the spectral index while achieving a sufficient number of e-folds. We use Bayesian model comparison tools to assess the relative performance of the models. We believe that these scenarios can be considered as a standard physical class of inflationary models, on a similar footing with monomial potentials.
dc.description42 LaTeX pages, 8 figures
dc.identifierhttps://arxiv.org/abs/0711.3436
dc.identifierhttp://arxiv.org/abs/0711.3436
dc.identifierJCAP 0803:018,2008
dc.identifierdoi:10.1088/1475-7516/2008/03/018
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/224123
dc.subjectHigh Energy Physics - Phenomenology
dc.subjectAstrophysics
dc.subjectHigh Energy Physics - Theory
dc.titleFlat Tree-level Inflationary Potentials in Light of CMB and LSS Data
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