Inflating in a better racetrack

Jose Juan Blanco-Pillado, Cliff P. Burgess, James M. Cline, Cristina Escoda, Marta Gómez-Reino, Renata Kallosh, Andrei Linde, Fernando Quevedo

Research output: Contribution to journalArticlepeer-review


We present a new version of our racetrack inflation scenario which, unlike our original proposal, is based on an explicit compactification of type IIB string theory: the Calabi-Yau manifold ℙ4[1,1,1,6,9]. The axion-dilaton and all complex structure moduli are stabilized by fluxes. The remaining 2 Kähler moduli are stabilized by a nonperturbative superpotential, which has been explicitly computed. For this model we identify situations for which a linear combination of the axionic parts of the two Kähler moduli acts as an inflaton. As in our previous scenario, inflation begins at a saddle point of the scalar potential and proceeds as an eternal topological inflation. For a certain range of inflationary parameters, we obtain the COBE-normalized spectrum of metric perturbations and an inflationary scale of M = 3 × 1014 GeV. We discuss possible changes of parameters of our model and argue that anthropic considerations favor those parameters that lead to a nearly flat spectrum of inflationary perturbations, which in our case is characterized by the spectral index ns = 0.95.

Original languageEnglish (US)
Article number002
JournalJournal of High Energy Physics
Issue number9
StatePublished - Sep 1 2006


  • Cosmology of Theories beyond the SM
  • D-branes
  • Superstring Vacua
  • Supersymmetry Phenomenology

ASJC Scopus subject areas

  • Nuclear and High Energy Physics


Dive into the research topics of 'Inflating in a better racetrack'. Together they form a unique fingerprint.

Cite this