Non-Gaussianities in models with a varying inflaton decay rate
نویسندگان
چکیده
منابع مشابه
Inflaton Decay ∗
A new theory of thermal history after inflation is outlined by taking into account the effect of parametric resonance caused by inflaton oscillation. A typical outcome is existence of a high temperature phase, that makes possible GUT baryogenesis consistently with low enough gravitino abundance.
متن کاملLeptogenesis in Inflaton Decay
We study a leptogenesis via decays of heavy Majorana neutrinos produced non-thermally in inflaton decays. We find that this scenario is fully consistent with existing supersymmetric inflation models such as for topological or for hybrid inflation and the Froggatt-Nielsen mechanism generating hierarchies in quark and lepton mass matrices. The reheating temperature TR of inflation may be taken as...
متن کاملClassical decay of inflaton
We present the first fully non-linear calculation of inflaton decay. We map inflaton decay onto an equivalent classical problem and solve the latter numerically. In the λφ model, we find that parametric resonance develops slower and ends at smaller values of fluctuating fields, as compared to estimates existing in literature. We also observe a number of qualitatively new phenomena, including a ...
متن کاملThe Inflationary Trispectrum for Models with Large Non - Gaussianities
We compute the leading order contribution to the four-point function of the primordial curvature perturbation in a class of single field models where the inflationary Lagrangian is a general function of the inflaton and its first derivative. This class of models includes string motivated inflationary models such as DBI inflation. We find that the trispectrum for some range of parameters could p...
متن کاملGravitino Overproduction in Inflaton Decay
Most of the inflation models end up with non-vanishing vacuum expectation values of the inflaton fields φ in the true vacuum, which induce, in general, nonvanishing auxiliary field Gφ for the inflaton potential in supergravity. We show that the presence of nonzero Gφ gives rise to inflaton decay into a pair of the gravitinos and are thereby severely constrained by cosmology especially if the gr...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Physical Review D
سال: 2004
ISSN: 1550-7998,1550-2368
DOI: 10.1103/physrevd.69.043508