String theory and hybrid inflation / acceleration

By Carlos A. R. Herdeiro, S. Hirano, R. Kallosh. 2001

153 citations recorded by the source corpus.

We find a description of hybrid inflation in (3+1)-dimensions using brane dynamics of Hanany-Witten type. P-term inflation/acceleration of the universe with the hybrid potential has a slow-roll de Sitter stage and a waterfall stage which leads towards an = 2 supersymmetric ground state. We identify the slow-roll stage of inflation with a non-supersymmetric `Coulomb phase' with Fayet-Iliopoulos term. This stage ends when the mass squared of one of the scalars in the hypermultiplet becomes negative. At that moment the brane system starts undergoing a phase transition via tachyon condensation to a fully Higgsed supersymmetric vacuum which is the absolute ground state of P-term inflation. A string theory/cosmology dictionary is provided, which leads to constraints on parameters of the brane construction from cosmological experiments. We display a splitting of mass levels reminiscent of the Zeeman effect due to spontaneous supersymmetry breaking.

Subfields: Astronomy and Astrophysics, Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/f96d82bd1cb8096299d2c51008a399c5d8238a06

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Astronomy and Astrophysics

In Nuclear and High Energy Physics

Citations in the corpus

Heterotic Strings with Torsion (2002, background): “to reach a supersymmetric background which is the minima of the hybrid inflationary-potential [ 21 ].”
Compactifications of heterotic strings on non-Kähler complex manifolds II (2003, background): “It will also be interesting to relate this discussion to the recent developments on de-Sitter spacetime done in [97],[54],[55].”
Lectures on string/brane cosmology (2002, background): “based on the attraction of D3 and D7 branes with magnetic fluxes, was proposed in [32].”
On brane inflation with volume stabilization (2003, methodology): “Brane inflation models [1, 2, 3, 4] provide a significant step towards this goal.”
Problems with Tachyon Inflation (2002, background): “Significant progress in was achieved in [6, 7] for the second class of brane inflation models, where instead of brane-antibrane annihilation the authors considered BPS branes either at small angles [6] or in the presence of small background fields [7].”
Inflation from a tachyon fluid (2002, unknown): “(For related speculations, see for instance [5].”