Minimal Extensions of the alpha-Starobinsky Model: Reconciling ACT DR6 and Reheating Constraints

arXiv:2606.24131 · astro-ph.CO, gr-qc, hep-ph · Submitted 2026-06-23 · Read on arXiv

Nehla Shobcha, Norma Sidik Risdianto, Romy Hanang Setya Budhi

astro-ph.CO, gr-qc, hep-ph

Submitted: 2026-06-23

Comments: 8 pages, 2 Figures

License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/

Terminology

• Reheating — 51× in this paper · explained in 2 episodes
• Consistency — 11× in this paper · explained in 3 episodes
• Atacama Cosmology Telescope — 5× in this paper
• Big Bang Nucleosynthesis — 3× in this paper
• alpha — 3× in this paper · explained in 1 episode
• Degeneracy — 2× in this paper · explained in 3 episodes
• Generalization — 2× in this paper · explained in 13 episodes
• ACT Data — 1× in this paper · explained in 1 episode

Sources

• Reheating in Inflationary Cosmology: Theory and Applications
• Reheating after Inflation
• Thermal Production of Gravitinos
• Refined Predictions for Starobinsky Inflation and Post-inflationary Constraints in Light of ACT
• How long before the end of inflation were observable perturbations produced?
• Reheating and relic gravitational waves as remedies for degeneracies of non-canonical natural inflation
• Inflation Dynamics and Reheating
• Nonperturbative Dynamics Of Reheating After Inflation: A Review
• Perturbative analysis of the reheating dynamics of $\alpha$-attractors
• Planck 2018 results. VI. Cosmological parameters
• Planck 2018 results. X. Constraints on inflation
• BICEP / Keck XIII: Improved Constraints on Primordial Gravitational Waves using Planck, WMAP, and BICEP/Keck Observations through the 2018 Observing Season
• Bounds on very low reheating scenarios after Planck
• Starobinsky-like Inflationary Models as Avatars of No-Scale Supergravity
• Polynomial $\alpha$-attractors
• $\alpha$-attractor inflation: Models and predictions
• No-Scale Inflation
• Starobinsky Inflation: From Non-SUSY To SUGRA Realizations
• Unified No-Scale Attractors
• Cosmological Attractors from $\alpha$-Scale Supergravity

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