Speaker
Mr.
Kumar Das
(Senior Research Fellow)
Description
We made a systematic study of supergravity contributions relevant for inflationary models in Jordan frame supergravity. In a special class of Jordan frame, the scalar potential separates into a tree-level term and a supergravity contribution term, which is potentially dangerous for sustaining inflation. If during inflation the vacuum energy is mainly due to the F-term of an auxiliary non-inflaton field, the supergravity corrections to the scalar potential are generically suppressed or may even vanish if the superpotential vanishes along the inflationary trajectory. However, if the F-term of inflaton dominates the vacuum energy, supergravity contributions are generically comparable to global supersymmetric contributions. In addition, the non-minimal coupling significantly impacts inflationary models depending on the size and sign of this coupling. In this connection the phenomenology of some representative models are discussed.
Primary author
Mr.
Kumar Das
(Senior Research Fellow)
Co-authors
Prof.
Koushik Dutta
(Saha Institute Of Nuclear Physics)
Dr.
Valerie Domcke
(PCCP Fellow)
