Natural Inflation with Natural Trans-Planckian Axion Decay Constant from Anomalous $U(1{)}_X$

Abstract

We propose a natural inflation model driven by an imaginary or axionic component of a Kähler modulus in string-inspired supergravity. The shift symmetry of the axion is gauged under an anomalous $U(1{)}_X$ symmetry, which leads to a modulus-dependent Fayet-Iliopoulos (FI) term. The matter fields are stabilized by F-terms, and the real component of the modulus is stabilized by the $U(1{)}_X$ D-term, while its axion remains light. Therefore, the masses of real and imaginary components of the modulus are separated at different scales. The scalar potential for natural inflation is realized by the superpotential from the non-perturbative effects. The trans-Planckian axion decay constant, which is needed to fit with BICEP2 observations, can be obtained naturally in this model.

arXiv comment14 pages, no figure, references added, version published in JHEP

References in corpus (12)

• BICEP2 I: Detection Of B-mode Polarization at Degree Angular Scales
• Axions In String Theory
• Completing Natural Inflation
• N-flation
• On the Possibility of Large Axion Decay Constants
• deSitter vacua from uplifting D-terms in effective supergravities from realistic strings
• de-Sitter vacua via consistent D-terms
• On Inflation in String Theory
• Large D-terms, hierarchical soft spectra and moduli stabilisation
• Racetrack inflation and assisted moduli stabilisation
• F-term uplifting via consistent D-terms
• D-term Uplifted Racetrack Inflation

Cited by in corpus (13)

• ${\mathcal{R}}^2$ inflation from scale invariant supergravity and anomaly free superstrings with fluxes
• Combining Universal and Odd RR Axions for Aligned Natural Inflation
• Helical Phase Inflation
• Inflation with Fayet-Iliopoulos Terms
• Modified Lyth bound and implications of BICEP2 results
• Phase Locked Inflation -- Effectively Trans-Planckian Natural Inflation
• Dynamical breaking of shift-symmetry in supergravity-based inflation
• Aligned Natural Inflation and Moduli Stabilization from Anomalous $U(1)$ Gauge Symmetries
• Inflation, Gravity Mediated Supersymmetry Breaking, and de Sitter Vacua in Supergravity with a Kähler-Invariant FI Term
• Symmetry Breaking Indication for Supergravity Inflation in Light of the Planck 2015
• The Renormalizable Three-Term Polynomial Inflation with Large Tensor-to-Scalar Ratio
• N-flation in Supergravity
• Generic no-scale inflation inspired from string theory compactifications