| 研究実績の概要 |
During the final(5th) year we strengthened our basic proposal of the viable phenomenological description of inflation, dark energy and dark matter in modified supergravity theory, by getting new models that simultaneously describe Starobinsky inflation and the dark energy as a de Sitter vacuum after the inflation. We also proposed and studied our new model of the dark matter composed of heavy gravitino particles in the context of our supergravity models with high-scale supersymmetry breaking. The specific mechanisms of supersymmetry breaking turned out to be the key to the viable phenomenological description. The main problems we encountered were mixing of the inflaton (scalaron) with other physical scalars that can easily destabilize a single field inflation, and the need to disentangle the F-type and D-type supersymmetry breaking terms, in order to solve the hierarchy problem between the inflationary scale and the dark energy scale. To achieve this, we employed two new supergravity tools: the supersymmetric Born-Infeld non-linear electrodynamics and the new Fayet-Iliopoulos terms that do not require gauging the R-symmetry. We published 8 original research papers about our new results in high-ranking international (peer-reviewed) journals of physics. During the 5th year, the PI gave 2 invited presentations of our research results at major international conferences in high energy physics and cosmology. Our research opened the way towards further unification of inflation, dark energy and dark matter with the Standard Model of elementary particles in supergravity theory.
|
