Observational constraints on an inflation model with a running mass

Abstract

We explore a model of inflation where the inflaton mass-squared is generated at a high scale by gravity-mediated soft supersymmetry breaking, and runs at lower scales to the small value required for slow-roll inflation. The running is supposed to come from the coupling of the inflaton to a non-Abelian gauge field. In contrast with earlier work, we do not constrain the magnitude of the supersymmetry breaking scale, and we find that the model might work even if squark and slepton masses come from gauge-mediated supersymmetry breaking. With the inflaton and gaugino masses in the expected range, and $\alpha =g^2/4\pi$ in the range $10^{-2}$ to $10^{-3}$ (all at the high scale) the model can give the observed cosmic microwave anisotropy, and a spectral index in the observed range. The latter has significant variation with scale, which can confirm or rule out the model in the forseeable future.

Latex, 19 pages, 14 figures, uses epsf.sty

References in corpus (16)

• False Vacuum Inflation with Einstein Gravity
• The Cold Dark Matter Density Perturbation
• Large Scale Structure and Supersymmetric Inflation without Fine Tuning
• Thermal Inflation and the Moduli Problem
• Hybrid Inflation in Supergravity
• Inflation, Supergravity and Superstrings
• Supernatural Inflation: Inflation from Supersymmetry with No (Very) Small Parameters
• Recycling universe
• Flattening the Inflaton's Potential with Quantum Corrections
• Four-year COBE normalization of inflationary cosmologies
• Flattening the Inflaton's Potential with Quantum Corrections II
• Supersymmetric Inflation With Constraints on Superheavy Neutrino Masses
• Dynamical Inflation and Unification Scale on Quantum Moduli Spaces
• Inflation and flat directions in modular invariant superstring effective theories
• New Constraints on Superpartner Masses
• Natural Inflation in SUSY and Gauge-Mediated Curvature of the Flat Directions

Cited by in corpus (36)

• Encyclopaedia Inflationaris
• Halo Substructure And The Power Spectrum
• Probing the inflaton: Small-scale power spectrum constraints from measurements of the CMB energy spectrum
• Induced gravitational wave background and primordial black holes
• Observable Spectra of Induced Gravitational Waves from Inflation
• Inflation, cold dark matter, and the central density problem
• Models of inflation liberated by the curvaton hypothesis
• Observable induced gravitational waves from an early matter phase
• Black hole formation and slow-roll inflation
• WMAPping inflationary physics
• Black hole constraints on the running-mass inflation model
• Density profiles of ultracompact minihalos: Implications for constraining the primordial power spectrum
• Are ultracompact minihalos really ultracompact?
• A new probe of the small-scale primordial power spectrum: astrometric microlensing by ultracompact minihalos
• Inflation and Supersymmetry Breaking
• Running of the Scalar Spectral Index from Inflationary Models
• Generating Primordial Black Holes Via Hilltop-Type Inflation Models
• New Constraints on inflation from the Cosmic Microwave Background
• Constraints on amplitudes of curvature perturbations from primordial black holes
• Primordial Black Holes, Eternal Inflation, and the Inflationary Parameter Space after WMAP5
• Precise Measurements of Primordial Power Spectrum with 21 cm Fluctuations
• How to fool CMB parameter estimation
• Primordial Black Hole Dark Matter and LIGO/Virgo Merger Rate from Inflation with Running Spectral Indices: Formation in the Matter- and/or Radiation-Dominated Universe
• Testing Inflation and Curvaton Scenarios with CMB Distortions
• Large curvature perturbations near horizon crossing in single-field inflation models
• The running-mass inflation model and WMAP
• New Constraints on the running-mass inflation model
• Cosmological constraints from evaporations of primordial black holes
• Observational constraints on the spectral index of the cosmological curvature perturbation
• Global fits for the spectral index of the cosmological curvature perturbation
• Quantum corrections to inflation: the importance of RG-running and choosing the optimal RG-scale
• Inflationary models with a flat potential enforced by non-abelian discrete gauge symmetries
• Hybrid inflation with running inflaton mass
• Testing kinetically coupled inflation models with CMB distortions
• Low-scale supergravity inflation with R-symmetry
• Radiative Inflation and Dark Energy