Kahler moduli inflation
By Joseph P. Conlon, F. Quevedo. 2005
257 citations recorded by the source corpus.
We show that under general conditions there is at least one natural inflationary direction for the Kahler moduli of type-IIB flux compactifications. This requires a Calabi-Yau which has h^{1,1}>2$>h2,1>h1,1>2 and for which the structure of the scalar potential is as in the recently found exponentially large volume compactifications. We also need - although these conditions may be relaxed - at least one Kahler modulus whose only non-vanishing triple-intersection is with itself and which appears by itself in the non-perturbative superpotential. Slow-roll inflation then occurs without a fine tuning of parameters, evading the η problem of F-term inflation. In order to obtain COBE-normalised density perturbations, the stabilised volume of the Calabi-Yau must be (105−107) in string units, and the inflationary scale Minfl ~ 1013 GeV. We find a robust model independent prediction for the spectral index of 1−2/Ne = 0.960→0.967, depending on the number of efoldings.
Subfields: Astronomy and Astrophysics, Nuclear and High Energy Physics
View Paper: https://www.semanticscholar.org/paper/634d372210bf941fe31e6b4696b6d1012e7590c6
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Citations in the corpus
- Axion cosmology and the energy scale of inflation (2008, background): “If we consider the small subspace (see [39–41]) of presently constructed string models that both inflate and agree with the observed values of Q and ns, we are left with models that tend to be at rather small energies, typically r < 10−8 for D-brane models and various other scenarios such as modular”
- The type IIB string axiverse and its low-energy phenomenology (2012, background): “This is also the value of the volume which gives the right amount of density perturbations in the inflationary model of [50] where the inflaton is a blow-up mode fixed by non-perturbative effects.”
- The best inflationary models after Planck (2013, background): “Firstly, the answer to the central question of this paper, namely “what is the best model of inflation given the Planck 2013 data?” is KMIII inflation [51–53], whose Bayes factor with respect to Higgs inflation is lnBKMIII HI = 0.”
- Roulette inflation with kähler moduli and their axions (2006, methodology): “Our results support the conclusions of Conlon and Quevedo [ 9 ] who first suggested this model of inflation.”
- Volume modulus inflation and the gravitino mass problem (2008, methodology): “This direction is lifted only by non-perturbative superpotential terms and so is flat at large τs. This is equivalent to the method used to generate a flat inflationary direction in K¨ahler moduli inflat i on [9,10].”
- Explicit de Sitter flux vacua for global string models with chiral matter (2013, background): “These are the right features to realise different promising models where the inflaton is a Kähler modulus [86–89].”
- Inflating in a Better Racetrack (2006, background): “[ 14 ] inflation is generically achieved in models with more than two K¨ahler moduli, but the”
- Inflationary Constraints on Type IIA String Theory (2007, background): “For this reason, the past few years have seen intense investigation into the possibility of inflation driven by closed string moduli [16, 17, 18, 19, 20], axions [21, 22, 23, 24, 25], or D-brane positions [26, 27, 28, 29, 30, 31] in the extra dimensions.”