Dear All,
For the cosmology seminar today we will have Prof. David Wands
from Portsmouth:
Local non-Gaussianity from inflation: beyond fNL
fNL has become widely used to quantify the non-Gaussianity of the
primordial density perturbation due to inflation or alternative models
for the origin of structure in the very early universe. fNL is
sufficient to describe the primordial bispectrum in some models,
notably the curvaton or ekpyrotic models. However other models of local
evolution on super-Hubble scales may produce other types of local
non-Gaussianity which may have different observational signatures. One
can also give more information, which may be testable observationally,
including higher-order statistics (such as the trispectrum) or the full
probability distribution function.
The seminar will be at noon in room H503 (Huxley Building)
in South Kensington Campus.
We will go to lunch with the speaker at 1pm.
Cheers,
Paniez