Karlsruhe 2011 – wissenschaftliches Programm
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T: Fachverband Teilchenphysik
T 22: Astroteilchenphysik und Kosmologie (Theorie)
T 22.6: Vortrag
Mittwoch, 30. März 2011, 18:00–18:15, 30.23: 3-1
Unified Matter Inflation in SUSY GUTs — Stefan Antusch1, Mar Bastero-Gil2, •Jochen Baumann1, Koushik Dutta3, Steve King4, and Philipp Kostka1 — 1Max-Planck-Institut für Physik (Werner-Heisenberg-Institut), München — 2Universidad de Granada, Granada — 3DESY, Hamburg — 4University of Southampton, Southampton
In this talk we explore the novel possibility that the inflaton responsible for cosmological inflation is a gauge non-singlet matter field in supersymmetric (SUSY) Grand Unified Theories (GUTs). We consider hybrid-like inflation models in SUSY where we show that the scalar components of gauge non-singlet superfields, together with fields in conjugate representations, may form a D-flat direction suitable for inflation. We apply these ideas to SUSY models with an Abelian gauge group, a Pati-Salam gauge group and finally Grand Unified Theories based on SO(10). Here, the scalar components of the matter superfields in the 16s may combine with a single 16 to form the inflaton. Focusing on the special case of sneutrino inflation, we calculate the one-loop Coleman-Weinberg corrections and the two-loop corrections from gauge interactions giving rise to the “gauge η-problem” and show that both corrections do not spoil inflation, and the monopole problem can be resolved. The usual η-problem may also be resolved in supergravity by the use of a Heisenberg symmetry.