2012/07/31 by Stefan Antusch, David Nolde · 22 citations
Mathematics · Physics and Astronomy · #Advanced Mathematical Physics Problems #Black Holes and Theoretical Physics #Cosmic background radiation #Cosmological model #Cosmology and Gravitation Theories #Inflation (cosmology) #Inflaton #Loop (graph theory) #Mixing (physics) #Universe #astro-ph.CO #hep-ph
paper · pdf · doi:10.1088/1475-7516/2012/11/005
published in Journal of Cosmology and Astroparticle Physics 2012(11), 005 (Institute of Physics) · 28 pages, v2: added some references, this version matches the publication in JCAP
openalex publication_date 2012/11/05 · arxiv created 2013/01/03 · arxiv updated 2015/06/05 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We discuss a new class of tribrid inflation models in supergravity, where the shape of the inflaton potential is dominated by effects from the Kähler potential. Tribrid inflation is a variant of hybrid inflation which is particularly suited for connecting inflation with particle physics, since the inflaton can be a D-flat combination of charged fields from the matter sector. In models of tribrid inflation studied so far, the inflaton potential was dominated by either loop corrections or by mixing effects with the waterfall field (as in “pseudosmooth” tribrid inflation). Here we investigate the third possibility, namely that tribrid inflation is dominantly driven by effects from higher-dimensional operators of the Kähler potential. We specify for which superpotential parameters the new regime is realized and show how it can be experimentally distinguished from the other two (loop-driven and “pseudosmooth”) regimes.