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Fluxbranes: moduli stabilisation and inflation

  • Arthur Hebecker
  • Sebastian C. Kraus
  • Moritz Küntzler
  • Dieter Lüst
  • Timo Weigand
Article

Abstract

Fluxbrane inflation is a stringy version of D-term inflation in which two fluxed D7-branes move towards each other until their (relative) gauge flux annihilates. Compared to brane-antibrane inflation, the leading-order inflationary potential of this scenario is much flatter. In the present paper we first discuss a new explicit moduli stabilisation procedure combining the F - and D-term scalar potentials: it is based on fluxed D7-branes in a geometry with three large four-cycles of hierarchically different volumes. Subsequently, we combine this moduli stabilisation with the fluxbrane inflation idea, demonstrating in particular that CMB data (including cosmic string constraints) can be explained within our setup of hierarchical large volume CY compactifications. We also indicate how the η-problem is expected to re-emerge through higher-order corrections and how it might be overcome by further refinements of our model. Finally, we explain why recently raised concerns about constant FI terms do not affect the consistent, string-derived variant of D-term inflation discussed in this paper.

Keywords

Strings and branes phenomenology 

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Copyright information

© SISSA, Trieste, Italy 2013

Authors and Affiliations

  • Arthur Hebecker
    • 1
  • Sebastian C. Kraus
    • 1
  • Moritz Küntzler
    • 2
  • Dieter Lüst
    • 3
    • 4
  • Timo Weigand
    • 1
  1. 1.Institut für Theoretische PhysikUniversität HeidelbergHeidelbergGermany
  2. 2.Department of MathematicsKing’s College LondonLondonU.K.
  3. 3.Arnold-Sommerfeld-Center, Ludwig-Maximilians-UniversitätMünchenGermany
  4. 4.Max-Planck-Institut für PhysikMünchenGermany

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