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arXiv · 2112.04466

BICEP/Keck Constraints on Attractor Models of Inflation and Reheating

John Ellis·Marcos A. G. Garcia·Dimitri V. Nanopoulos·Keith A. Olive·Sarunas Verner
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Abstract

Recent BICEP/Keck data on the cosmic microwave background, in combination with previous WMAP and Planck data, impose strong new constraints on the tilt in the scalar perturbation spectrum, $n_s$, as well as the tensor-to-scalar ratio, $r$. These constrain the number of e-folds of inflation, $N_*$, the magnitude of the inflaton coupling to matter, $y$, and the reheating temperature, $T_{\rm reh}$, which we evaluate in attractor models of inflation as formulated in no-scale supergravity. The 68% C.L. region of $(n_s, r)$ favours large values of $N_*, y$ and $T_{\rm reh}$ that are constrained by the production of gravitinos and supersymmetric dark matter.

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John Ellis, Marcos A. G. Garcia, Dimitri V. Nanopoulos, Keith A. Olive, Sarunas Verner. 2021-12-08. BICEP/Keck Constraints on Attractor Models of Inflation and Reheating. https://doi.org/10.1103/physrevd.105.043504

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