Speaker
Kari Enqvist
Description
Curvaton is a scalar field which during inflation is a
spectator but
which becomes dynamically important after inflation and
generates the
primordial perturbation. I present the basic idea and
discuss the
non-gaussianities. The fact that the curvaton must decay
implies
radiative corrections to the potential, which can be
important for the
dynamics. Likewise, non-linearities of the curvaton
potential can have
a considerable impact on the model prediction for non-
gaussianities. I
also discuss an attempt at a realistic model, where the
Standard Model
degrees of freedom are produced by virtue of a higgs-
curvaton
coupling. In such a case, cosmological evolution of the
curvaton gives
rise to a fairly complicated pattern of resonant
production of
higgses, where thermal corrections play an important
role.
