BICEP/Keck constraints on attractor models of inflation and reheating

Open Access

BICEP/Keck constraints on attractor models of inflation and reheating

John Ellis, Marcos A. G. Garcia, Dimitri V. Nanopoulos, Keith A. Olive, and Sarunas Verner

Phys. Rev. D 105, 043504 – Published 3 February 2022

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, $T_{reh}$ , which we evaluate in attractor models of inflation as formulated in no-scale supergravity. The 68% C.L. region of $(n_{s}, r)$ favors large values of $N_{*}, y$ , and $T_{reh}$ that are constrained by the production of gravitinos and supersymmetric dark matter.

Received 29 December 2021
Accepted 14 January 2022

DOI:https://doi.org/10.1103/PhysRevD.105.043504

Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Funded by SCOAP³.

Published by the American Physical Society

Physics Subject Headings (PhySH)

Cosmic microwave background Inflation Supergravity Supersymmetric models

Gravitation, Cosmology & AstrophysicsParticles & Fields

Authors & Affiliations

John Ellis ¹, Marcos A. G. Garcia ², Dimitri V. Nanopoulos³, Keith A. Olive⁴, and Sarunas Verner⁴

¹Theoretical Particle Physics and Cosmology Group, Department of Physics, King’s College London, London WC2R 2LS, United Kingdom; Theoretical Physics Department, CERN, CH-1211 Geneva 23, Switzerland; NICPB, Rävala puiestee 10, 10143 Tallinn, Estonia
²Departamento de Física Teórica, Instituto de Física, Universidad Nacional Autónoma de México, A.P. 20-364, Ciudad de México 01000, Mexico
³George P. and Cynthia W. Mitchell Institute for Fundamental Physics and Astronomy, Texas A&M University, College Station, Texas 77843, USA; Astroparticle Physics Group, Houston Advanced Research Center (HARC), Mitchell Campus, Woodlands, Texas 77381, USA; Academy of Athens, Division of Natural Sciences, Athens 10679, Greece
⁴William I. Fine Theoretical Physics Institute, School of Physics and Astronomy, University of Minnesota, Minneapolis, Minnesota 55455, USA

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Issue

Vol. 105, Iss. 4 — 15 February 2022

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