Scale dependence of the scalar spectral index, flat tree-level potentials and NROs

by Guillermo Ballesteros (CERN/Madrid)

Wednesday 16 Jan 2008, 11:00 → 12:00 Europe/Zurich

1/1-025 (CERN)

The present CMB and LSS data point towards the possibility of a strong scale dependence of the scalar spectral index. With this motivation, we will analyze generic features of flat-tree level potentials lifted by radiative corrections. We will see how the presence of non-renormalizable operators can help to explain the indications of a running index. We will describe the results of fitting the data using the primordial spectra derived from these classes of models and compare the results to the ones obtained with the standard parameterizations. References: hep-ph/0601134 arXiv:0711.3436