2017/07/04 by Kenji Kadota, Tatsuo Kobayashi, Keigo Sumita · 4 citations
Physics and Astronomy · #Anisotropy #Black Holes and Theoretical Physics #Cosmic microwave background #Cosmic string #Cosmology and Gravitation Theories #Galaxies: Formation, Evolution, Phenomena #Gauge symmetry #Gauge theory #Hierarchy problem #Higgs boson #Inflation (cosmology) #Inflaton #Mathematical physics #Particle physics #Physics #Quantum mechanics #Scalar field #String (physics) #Supergravity #Superpotential #Supersymmetry #Theoretical physics #astro-ph.CO #hep-ph #hep-th
paper · pdf · doi:10.1088/1475-7516/2017/11/033
published in Journal of Cosmology and Astroparticle Physics 2017(11), 033 (Institute of Physics) · 16 pages, 14 figures
arxiv created 2017/07/04 · openalex created_date 2017/07/14 · openalex publication_date 2017/11/21 · arxiv updated 2017/12/06 · openalex updated_date 2026/08/06
We propose a new model of the D-term hybrid inflation in the framework of supergravity. Although our model introduces, analogously to the conventional D-term inflation, the inflaton and a pair of scalar fields charged under a U(1) gauge symmetry, we study the logarithmic and exponential dependence on the inflaton field, respectively, for the Kähler and superpotential. This results in a characteristic one-loop scalar potential consisting of linear and exponential terms, which realizes the small-field inflation dominated by the Fayet-Iliopoulos term. With the reasonable values for the coupling coefficients and, in particular, with the U(1) gauge coupling constant comparable to that of the Standard Model, our D-term inflation model can solve the notorious problems in the conventional D-term inflation, namely, the CMB constraints on the spectral index and the generation of cosmic strings.