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Journal of High Energy Physics

, 2017:207 | Cite as

Chiral global embedding of fibre inflation models

  • Michele Cicoli
  • David Ciupke
  • Victor A. Diaz
  • Veronica Guidetti
  • Francesco Muia
  • Pramod Shukla
Open Access
Regular Article - Theoretical Physics

Abstract

We construct explicit examples of fibre inflation models which are globally embedded in type IIB orientifolds with chiral matter on D7-branes and full closed string moduli stabilisation. The minimal setup involves a Calabi-Yau threefold with h1,1 = 4 Kähler moduli which features multiple K3 fibrations and a del Pezzo divisor supporting non-perturbative effects. We perform a consistent choice of orientifold involution, brane setup and gauge fluxes which leads to chiral matter and a moduli-dependent Fayet-Iliopoulos term. After D-term stabilisation, the number of Kähler moduli is effectively reduced to 3 and the internal volume reduces to the one of fibre inflation models. The inflationary potential is generated by suitable string loop corrections in combination with higher derivative effects. We analyse the inflationary dynamics both in the single-field approximation and by numerically deriving the full multi-field evolution in detail. Interestingly, we find that the Kähler cone conditions set strong constraints on the allowed inflaton field range.

Keywords

Compactification and String Models Cosmology of Theories beyond the SM Flux compactifications Superstring Vacua 

Notes

Open Access

This article is distributed under the terms of the Creative Commons Attribution License (CC-BY 4.0), which permits any use, distribution and reproduction in any medium, provided the original author(s) and source are credited.

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Copyright information

© The Author(s) 2017

Authors and Affiliations

  1. 1.Dipartimento di Fisica e AstronomiaUniversità di BolognaBolognaItaly
  2. 2.INFN, Sezione di BolognaBolognaItaly
  3. 3.Abdus Salam ICTPTriesteItaly
  4. 4.Rudolf Peierls Centre for Theoretical PhysicsUniversity of OxfordOxfordU.K.

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