Is Imaginary Starobinsky Model Real?

Abstract

We investigate the recently proposed possibility of chaotic inflation with respect to the imaginary part of the field T in a supersymmetric embedding of the Starobinsky model. We show that the stage of rapid expansion driven by Im T in this model ends almost instantly, and the subsequent stages of inflation are driven by the real part of the field T, as in the standard Starobinsky model. Thus, the Starobinsky model and its supersymmetric generalizations remain disfavored by the recent BICEP2 data.

10 pages, 6 figures, minor corrections

References in corpus (14)

• BICEP2 I: Detection Of B-mode Polarization at Degree Angular Scales
• Planck 2013 results. XXII. Constraints on inflation
• Superconformal Inflationary $\alpha$-Attractors
• Natural Chaotic Inflation in Supergravity
• Minimal Supergravity Models of Inflation
• A universal attractor for inflation at strong coupling
• Superconformal generalizations of the Starobinsky model
• New models of chaotic inflation in supergravity
• General inflaton potentials in supergravity
• On the Starobinsky Model of Inflation from Supergravity
• The Imaginary Starobinsky Model
• Cosmological Attractor Models and Higher Curvature Supergravity
• On the Supersymmetric Completion of $R+R^2$ Gravity and Cosmology
• Higher Order Corrections in Minimal Supergravity Models of Inflation

Cited by in corpus (39)

• The Imaginary Starobinsky Model
• Vacuum Energy Sequestering: The Framework and Its Cosmological Consequences
• Inflation and High-Scale Supersymmetry with an EeV Gravitino
• Accelerating Cosmology and Phase Structure of F(R) Gravity with Lagrange Multiplier Constraint: Mimetic Approach
• Resurrecting Quadratic Inflation in No-Scale Supergravity in Light of BICEP2
• A No-Scale Inflationary Model to Fit Them All
• Angular inflation in multi-field $\alpha$-attractors
• Hypernatural inflation
• Two-Field Analysis of No-Scale Supergravity Inflation
• Keeping the relation between the Starobinsky model and no-scale supergravity ACTive
• One-loop Modified Gravity in de Sitter Universe, Quantum Corrected Inflation, and its Confrontation with the Planck Result
• Complexified Starobinsky Inflation in Supergravity in the Light of Recent BICEP2 Result
• Unified No-Scale Attractors
• On reaching the adiabatic limit in multi-field inflation
• The Imaginary Starobinsky Model and Higher Curvature Corrections
• Reinterpretation of the Starobinsky model
• Starobinsky-Like Inflation and Neutrino Masses in a No-Scale SO(10) Model
• Slow and Safe Gravitinos
• On the initial conditions for inflation with plateau potentials: the $R+R^2$ (super)gravity case
• Inflation beyond T-models and primordial B-modes
• Gravity Waves From Non-Minimal Quadratic Inflation
• Reconciling Induced-Gravity Inflation in Supergravity With The Planck 2013 & BICEP2 Results
• Exponential potential for an inflaton with nonminimal kinetic coupling and its supergravity embedding
• Inflation and Leptogenesis in High-Scale Supersymmetry
• From $R^2$ Gravity to No-Scale Supergravity
• Phenomenology and Cosmology of No-Scale Attractor Models of Inflation
• Inflation and Dark Energy with a Single Superfield
• On Supersymmetric Geometric Flows and ${\mathcal{R}}^2$ Inflation From Scale Invariant Supergravity
• Inflation in $R^2$ supergravity with non-minimal superpotentials
• Non-Oscillatory No-Scale Inflation
• From Minkowski to de Sitter in Multifield No-Scale Models
• Naturalness and Chaotic Inflation in Supergravity from Massive Vector Multiplets
• Dilaton assisted two-field inflation from no-scale supergravity
• Higher Curvature Supergravity, Supersymmetry Breaking and Inflation
• Testing theories of Gravity and Supergravity with inflation and observations of the cosmic microwave background
• Multiple Field Inflation and Signatures of Heavy Physics in the CMB
• Inflationary behavior of $R^2$ gravity in a conformal framework
• BICEP2, the curvature perturbation and supersymmetry
• Radiative Inflation and Dark Energy RIDEs Again after BICEP2