Journal
JOURNAL OF HIGH ENERGY PHYSICS
Volume -, Issue 3, Pages -Publisher
SPRINGER
DOI: 10.1088/1126-6708/2009/03/093
Keywords
Gauge-gravity correspondence; Cosmology of Theories beyond the SM
Categories
Funding
- David and Lucile Packard Foundation
- Alfred P. Sloan Foundation
- Center for the Fundamental Laws of Nature and the Center for Astrophysics at Harvard
- Stanford Institute for Theoretical Physics
- NSF [PHY-0756174, PHY-0756966, PHY-0355005]
- DOE [DE-AC03-76SF00515]
- RFBR [07-02-00878]
- [NSh-3035.2008.2]
- STFC [ST/G000581/1] Funding Source: UKRI
- Science and Technology Facilities Council [ST/G000581/1] Funding Source: researchfish
- Direct For Mathematical & Physical Scien
- Division Of Physics [756174] Funding Source: National Science Foundation
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We provide a systematic treatment of possible corrections to the inflaton potential for D-brane inflation in the warped deformed conifold. We consider the D3-brane potential in the presence of the most general possible corrections to the throat geometry sourced by coupling to the bulk of a compact Calabi-Yau space. This corresponds to the potential on the Coulomb branch of the dual gauge theory, in the presence of arbitrary perturbations of the Lagrangian. The leading contributions arise from perturbations by the most relevant operators that do not destroy the throat geometry. We find a generic contribution from a non-chiral operator of dimension Delta = 2 associated with a global symmetry current, resulting in a negative contribution to the inflaton mass-squared. If the Calabi-Yau preserves certain discrete symmetries, this is the dominant correction to the inflaton potential, and fine-tuning of the inflaton mass is possible. In the absence of such discrete symmetries, the dominant contribution comes from a chiral operator with Delta = 3/2, corresponding to a phi(3/2) term in the inflaton potential. The resulting inflationary models are phenomenologically similar to the inflection point scenarios arising from specific D7-brane embeddings, but occur under far more general circumstances. Our strategy extends immediately to other warped geometries, given sufficient knowledge of the Kaluza-Klein spectrum.
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