ETD

• cosmologia
• curvatura
• inflazione
• pertubazione

The primordial curvature perturbation (ζ), generated during or at the end of Inflation,
is the seed of present structures. Non Gaussianity in ζ is an efficient tool to
discriminate among the different theoretical mechanisms which are thought to be
generating ζ. We study the effects of including high order loop corrections of a λφ^4
massless scalar field theory during a de Sitter stage in the prediction of non
Gaussianity in the trispectrum, i.e.the 4-point correlation function.