2017/09/30 by Fuminori Hasegawa, Kazunori Nakayama, Takahiro Terada +1
Physics and Astronomy · #Black Holes and Theoretical Physics #Cosmology and Gravitation Theories #Coupling (piping) #Gravitino #Inflation (cosmology) #Inflaton #Particle physics #Physics #Pulsars and Gravitational Waves Research #Supergravity #Superpotential #Supersymmetry #Theoretical physics #astro-ph.CO #hep-ph #hep-th
paper · pdf · doi:10.1016/j.physletb.2017.12.038
published as Physics Letters B 777 (2018) 270-274 · 14 pages; accepted by PLB, title and abstract changed to clarify the topic, conclusion not changed, references added
arxiv created 2017/12/19 · openalex publication_date 2017/12/19 · arxiv updated 2017/12/25 · openalex created_date 2018/01/05 · openalex updated_date 2026/08/06
We discuss the cosmological gravitino problem in inflation models in which the inflaton potential is constructed from Kähler potential rather than superpotential: a representative model is D3‾-induced geometric inflation. A critical ingredient in this type of models is the coupling of the inflaton and Polonyi (supersymmetry-breaking) field in the Kähler potential, which is needed to build the inflaton potential. We point out the same coupling let the inflaton dominantly decay into a pair of inflatino and gravitino causing the gravitino problem. We propose some possible solutions to this problem.