Gravitino Condensates in the Early Universe and Inflation
Abstract
We review work on the formation of gravitino condensates via the super-Higgs effect in the early Universe. This is a scenario for both inflating the early universe and breaking local supersymmetry (supergravity), entirely independent of any coupling to external matter. The goldstino mode associated with the breaking of (global) supersymmetry is "eaten" by the gravitino field, which becomes massive (via its own vacuum condensation) and breaks the local supersymmetry (supergravity) dynamically. The most natural association of gravitino condensates with inflation proceeds in an indirect way, via a Starobinsky-inflation-type phase. The higher-order curvature corrections of the (quantum) effective action of gravitino condensates induced by integrating out massive gravitino degrees of freedom in a curved space-time background, in the broken-supergravity phase, are responsible for inducing a scalar mode which inflates the Universe. The scenario is in agreement with Planck data phenomenology in a natural and phenomenologically-relevant range of parameters, namely Grand-Unified-Theory values for the supersymmetry breaking energy scale and dynamically-induced gravitino mass.
Keywords
Cite
@article{arxiv.1412.6437,
title = {Gravitino Condensates in the Early Universe and Inflation},
author = {Nick E. Mavromatos},
journal= {arXiv preprint arXiv:1412.6437},
year = {2014}
}
Comments
17 pages latex, uses special macros (EPJC style files), Plenary talk at 3rd International Conference on New Frontiers in Physics (ICNFP 2014), Kolymbari (Crete, Greece), July 28- August 6 2014