Journal
PHYSICAL REVIEW D
Volume 82, Issue 4, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.82.046003
Keywords
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Funding
- NSF [PHY-0355005, PHY-0244728]
- DOE [DE-AC03-76SF00515]
- BSF
- FQXi
- Alexander-von-Humboldt foundation
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Wrapped branes in string compactifications introduce a monodromy that extends the field range of individual closed-string axions to beyond the Planck scale. Furthermore, approximate shift symmetries of the system naturally control corrections to the axion potential. This suggests a general mechanism for chaotic inflation driven by monodromy-extended closed-string axions. We systematically analyze this possibility and show that the mechanism is compatible with moduli stabilization and can be realized in many types of compactifications, including warped Calabi-Yau manifolds and more general Ricci-curved spaces. In this broad class of models, the potential is linear in the canonical inflaton field, predicting a tensor to scalar ratio r approximate to 0.07 accessible to upcoming cosmic microwave background observations.
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