A grounded perspective on new early dark energy using ACT, SPT, and BICEP/Keck
Abstract We examine further the ability of the New Early Dark Energy model (NEDE) to resolve the current tension between the Cosmic Microwave Background (CMB) and local measurements of H 0 and the consequences for inflation. We perform new Bayesian analyses, including the current datasets from the g...
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crioppubl:10.1088/1475-7516/2023/02/041 2024-06-02T08:14:36+00:00 A grounded perspective on new early dark energy using ACT, SPT, and BICEP/Keck Cruz, Juan S. Niedermann, Florian Sloth, Martin S. 2023 http://dx.doi.org/10.1088/1475-7516/2023/02/041 https://iopscience.iop.org/article/10.1088/1475-7516/2023/02/041 https://iopscience.iop.org/article/10.1088/1475-7516/2023/02/041/pdf unknown IOP Publishing http://creativecommons.org/licenses/by/4.0/ https://iopscience.iop.org/info/page/text-and-data-mining Journal of Cosmology and Astroparticle Physics volume 2023, issue 02, page 041 ISSN 1475-7516 journal-article 2023 crioppubl https://doi.org/10.1088/1475-7516/2023/02/041 2024-05-07T13:55:04Z Abstract We examine further the ability of the New Early Dark Energy model (NEDE) to resolve the current tension between the Cosmic Microwave Background (CMB) and local measurements of H 0 and the consequences for inflation. We perform new Bayesian analyses, including the current datasets from the ground-based CMB telescopes Atacama Cosmology Telescope (ACT), the South Pole Telescope (SPT), and the BICEP/Keck telescopes, employing an updated likelihood for the local measurements coming from the S H 0 ES collaboration. Using the S H 0 ES prior on H 0 , the combined analysis with Baryonic Acoustic Oscillations (BAO), Pantheon, Planck and ACT improves the best-fit by Δ χ 2 = -15.9 with respect to ΛCDM, favors a non-zero fractional contribution of NEDE, f NEDE > 0, by 4.8 σ , and gives a best-fit value for the Hubble constant of H 0 = 72.09 km/s/Mpc (mean 71.49 ± 0.82 with 68% C.L.). A similar analysis using SPT instead of ACT yields consistent results with a Δ χ 2 = -23.1 over ΛCDM, a preference for non-zero f NEDE of 4.7 σ and a best-fit value of H 0 = 71.77 km/s/Mpc (mean 71.43 ± 0.85 with 68% C.L.). We also provide the constraints on the inflation parameters r and n s coming from NEDE, including the BICEP/Keck 2018 data, and show that the allowed upper value on the tensor-scalar ratio is consistent with the ΛCDM bound, but, as also originally found, with a more blue scalar spectrum implying that the simplest curvaton model is now favored over the Starobinsky inflation model. Article in Journal/Newspaper South pole IOP Publishing Hubble ENVELOPE(158.317,158.317,-80.867,-80.867) South Pole Journal of Cosmology and Astroparticle Physics 2023 02 041 |
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Abstract We examine further the ability of the New Early Dark Energy model (NEDE) to resolve the current tension between the Cosmic Microwave Background (CMB) and local measurements of H 0 and the consequences for inflation. We perform new Bayesian analyses, including the current datasets from the ground-based CMB telescopes Atacama Cosmology Telescope (ACT), the South Pole Telescope (SPT), and the BICEP/Keck telescopes, employing an updated likelihood for the local measurements coming from the S H 0 ES collaboration. Using the S H 0 ES prior on H 0 , the combined analysis with Baryonic Acoustic Oscillations (BAO), Pantheon, Planck and ACT improves the best-fit by Δ χ 2 = -15.9 with respect to ΛCDM, favors a non-zero fractional contribution of NEDE, f NEDE > 0, by 4.8 σ , and gives a best-fit value for the Hubble constant of H 0 = 72.09 km/s/Mpc (mean 71.49 ± 0.82 with 68% C.L.). A similar analysis using SPT instead of ACT yields consistent results with a Δ χ 2 = -23.1 over ΛCDM, a preference for non-zero f NEDE of 4.7 σ and a best-fit value of H 0 = 71.77 km/s/Mpc (mean 71.43 ± 0.85 with 68% C.L.). We also provide the constraints on the inflation parameters r and n s coming from NEDE, including the BICEP/Keck 2018 data, and show that the allowed upper value on the tensor-scalar ratio is consistent with the ΛCDM bound, but, as also originally found, with a more blue scalar spectrum implying that the simplest curvaton model is now favored over the Starobinsky inflation model. |
format |
Article in Journal/Newspaper |
author |
Cruz, Juan S. Niedermann, Florian Sloth, Martin S. |
spellingShingle |
Cruz, Juan S. Niedermann, Florian Sloth, Martin S. A grounded perspective on new early dark energy using ACT, SPT, and BICEP/Keck |
author_facet |
Cruz, Juan S. Niedermann, Florian Sloth, Martin S. |
author_sort |
Cruz, Juan S. |
title |
A grounded perspective on new early dark energy using ACT, SPT, and BICEP/Keck |
title_short |
A grounded perspective on new early dark energy using ACT, SPT, and BICEP/Keck |
title_full |
A grounded perspective on new early dark energy using ACT, SPT, and BICEP/Keck |
title_fullStr |
A grounded perspective on new early dark energy using ACT, SPT, and BICEP/Keck |
title_full_unstemmed |
A grounded perspective on new early dark energy using ACT, SPT, and BICEP/Keck |
title_sort |
grounded perspective on new early dark energy using act, spt, and bicep/keck |
publisher |
IOP Publishing |
publishDate |
2023 |
url |
http://dx.doi.org/10.1088/1475-7516/2023/02/041 https://iopscience.iop.org/article/10.1088/1475-7516/2023/02/041 https://iopscience.iop.org/article/10.1088/1475-7516/2023/02/041/pdf |
long_lat |
ENVELOPE(158.317,158.317,-80.867,-80.867) |
geographic |
Hubble South Pole |
geographic_facet |
Hubble South Pole |
genre |
South pole |
genre_facet |
South pole |
op_source |
Journal of Cosmology and Astroparticle Physics volume 2023, issue 02, page 041 ISSN 1475-7516 |
op_rights |
http://creativecommons.org/licenses/by/4.0/ https://iopscience.iop.org/info/page/text-and-data-mining |
op_doi |
https://doi.org/10.1088/1475-7516/2023/02/041 |
container_title |
Journal of Cosmology and Astroparticle Physics |
container_volume |
2023 |
container_issue |
02 |
container_start_page |
041 |
_version_ |
1800738510969241600 |