A minimal inflation scenario

作者：Alvarez Gaume Luis^*; Gomez Cesar; Jimenez Raul

来源：Journal of Cosmology and Astroparticle Physics, 2011, (3): 027.

DOI：10.1088/1475-7516/2011/03/027

• inflation
• string theory and cosmology
• physics of the early universe
• supersymmetry and cosmology

We elaborate on a minimal inflation scenario based entirely on the general properties of supersymmetry breaking in supergravity models. We identify the inflaton as the scalar component of the Goldstino superfield. We write plausible candidates for the effective action describing this chiral super field. In particular the theory depends (apart from parameters of O(1)) on a single free parameter: the scale of supersymmetry breaking. This can be fixed using the amplitude of CMB cosmological perturbations and we therefore obtain the scale of supersymmetry breaking to be 10(12-14) GeV. The model also incorporates explicit R-symmetry breaking in order to satisfy the slow roll conditions. In our model the eta-problem is solved without extra fine-tuning. We try to obtain as much information as possible in a model independent way using general symmetry properties of the theory's effective action, this leads to a new proposal on how to exit the inflationary phase and reheat the Universe.

• 出版日期2011-3