Speaker
Azadeh Maleknejad
(MPA Garching)
Description
Primordial SU(2) gauge fields coupled to axions can contribute
to the physics of inflation. Their rich phenomenology and unique
observational features, e.g., chiral primordial gravitational waves,
turned this class of models to a hot topic of study since their
discovery in 2011. In this talk, I will briefly review the models in
this class, which so far have been studied in the literature. Then, I
will talk about the three different types of particles produced by the
SU(2) gauge field in this setup, i.e., scalar, fermion, and spin-2
particles. I will explain how the size of the backreaction constrains
the parameter space of the models. Next, I will talk about the chiral
gravitational waves and how it is produced by the extra spin-2 particle,
which is the generic feature of this class of models. Finally, I will
finish my talk by the natural inflationary leptogenesis setting provided
by this class as their yet another generous opportunity!
Primary author
Azadeh Maleknejad
(MPA Garching)
