Luis Alvarez-Gaume, Cesar Gomez, Raul Jimenez
We discuss the phenomenology of the minimal inflation scenario. We
concentrate on two aspects: inflationary trajectories and particle production.
Our findings can be summarized in two main results: first, that inflationary
trayectories that are very flat and provide enough number of e-foldings are
very natural in the scenario without fine tunning. We present a general
formalism to identify attractors in multi-field inflation regardless of
trajectories fulfilling the slow-roll conditions. We then explore particle
production in the model and show how the inflaton naturally transmutes into the
current dark matter particle, thus providing a mechanism to identify the
inflaton today: it is the dark matter. One interesting feature of our model is
that it provides a novel mechanism to generate particles and entropy in the
universe: the filling of the Fermi sphere up to a given momentum pF due to the
sea of goldstinos that are an important part of the matter generated after
inflation. With this mechanism in hand we predict that the gravitino should
have a mass of > 100-1000 TeV.
View original:
http://arxiv.org/abs/1110.3984
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