Aug 23 – 28, 2010
Europe/Berlin timezone

Gauge Non-Singlet Inflation in SUSY GUTs

Aug 24, 2010, 4:12 PM
Hörsaal I (Bonn)

Hörsaal I


Nussallee 12


Mr Jochen P. Baumann (Max-Planck-Institut für Physik (Werner-Heisenberg-Institut))


We explore the novel possibility that the inflaton responsible for cosmological inflation is a gauge non-singlet in supersymmetric Grand Unified Theories. For definiteness we consider SUSY hybrid inflation 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) where the scalar components of the matter superfields in the 16s may combine with a single $\bar 16$ to form the inflaton, with the right-handed sneutrino direction providing a possible viable trajectory for inflation. Assuming sneutrino inflation, we calculate the one-loop Coleman-Weinberg corrections and the two-loop corrections from gauge interactions giving rise to the ''gauge eta-problem'' and show that both corrections do not spoil inflation, and that the monopole problem can be resolved.

Primary authors

Mr Jochen P. Baumann (Max-Planck-Institut für Physik (Werner-Heisenberg-Institut)) Dr Koushik Dutta (Max-Planck-Institut für Physik (Werner-Heisenberg-Institut)) Prof. Mar Bastero-Gil (Departamento de Fisica Teórica y del Cosmos and Centro Andaluz de Fisica de Particulas Elementales, Universidad de Granada) Mr Philipp M. Kostka (Max-Planck-Institut für Physik (Werner-Heisenberg-Institut)) Dr Stefan Antusch (Max-Planck-Institut für Physik (Werner-Heisenberg-Institut)) Prof. Steve F. King (School of Physics and Astronomy, University of Southampton)

Presentation materials