Inflation in supergravity with a single chiral superfield
Abstract
We propose new supergravity models describing chaotic Linde- and Starobinsky-like inflation in terms of a single chiral superfield. The key ideas to obtain a positive vacuum energy during large field inflation are (i) stabilization of the real or imaginary partner of the inflaton by modifying a Kähler potential, and (ii) use of the crossing terms in the scalar potential originating from a polynomial superpotential. Our inflationary models are constructed by starting from the minimal Kähler potential with a shift symmetry, and are extended to the no-scale case. Our methods can be applied to more general inflationary models in supergravity with only one chiral superfield.
- Publication:
-
Physics Letters B
- Pub Date:
- September 2014
- DOI:
- 10.1016/j.physletb.2014.07.036
- arXiv:
- arXiv:1406.0252
- Bibcode:
- 2014PhLB..736..272K
- Keywords:
-
- High Energy Physics - Theory;
- General Relativity and Quantum Cosmology;
- High Energy Physics - Phenomenology
- E-Print:
- 12 pages, 2 figures, published version