Cosmological data and indications for new physics
Data from the Atacama Cosmology Telescope (ACT) and the South Pole Telescope (SPT), combined with the nine-year data release from the WMAP satellite, provide very precise measurements of the cosmic microwave background (CMB) angular anisotropies down to very small angular scales. Augmented with meas...
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ftunivgeneve:oai:unige.ch:aou:unige:36485 2023-10-01T03:59:30+02:00 Cosmological data and indications for new physics Benetti, Micol Gerbino, Martina Kinney, William H. Kolb, Edward W. Lattanzi, Massimiliano Melchiorri, Alessandro Pagano, Luca Riotto, Antonio Walter 2013 https://archive-ouverte.unige.ch/unige:36485 eng eng info:eu-repo/semantics/altIdentifier/doi/10.1088/1475-7516/2013/10/030 https://archive-ouverte.unige.ch/unige:36485 unige:36485 info:eu-repo/semantics/restrictedAccess ISSN: 1475-7516 Journal of cosmology and astroparticle physics, vol. 2013, no. 10 (2013) p. 030-030 info:eu-repo/classification/ddc/500.2 Inflation Cosmological neutrinos Cosmological parameters from CMBR info:eu-repo/semantics/article Text Article scientifique info:eu-repo/semantics/publishedVersion 2013 ftunivgeneve https://doi.org/10.1088/1475-7516/2013/10/030 2023-09-07T07:14:19Z Data from the Atacama Cosmology Telescope (ACT) and the South Pole Telescope (SPT), combined with the nine-year data release from the WMAP satellite, provide very precise measurements of the cosmic microwave background (CMB) angular anisotropies down to very small angular scales. Augmented with measurements from Baryonic Acoustic Oscillations surveys and determinations of the Hubble constant, we investigate whether there are indications for new physics beyond a Harrison-Zel'dovich model for primordial perturbations and the standard number of relativistic degrees of freedom at primordial recombination. All combinations of datasets point to physics beyond the minimal Harrison-Zel'dovich model in the form of either a scalar spectral index different from unity or additional relativistic degrees of freedom at recombination (e.g., additional light neutrinos). Beyond that, the extended datasets including either ACT or SPT provide very different indications: while the extended-ACT (eACT) dataset is perfectly consistent with the predictions of standard slow-roll inflation, the extended-SPT (eSPT) dataset prefers a non-power-law scalar spectral index with a very large variation with scale of the spectral index. Both eACT and eSPT favor additional light degrees of freedom. eACT is consistent with zero neutrino masses, while eSPT favors nonzero neutrino masses at more than 95% confidence. Article in Journal/Newspaper South pole Université de Genève: Archive ouverte UNIGE South Pole Hubble ENVELOPE(158.317,158.317,-80.867,-80.867) Journal of Cosmology and Astroparticle Physics 2013 10 030 030 |
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Open Polar |
collection |
Université de Genève: Archive ouverte UNIGE |
op_collection_id |
ftunivgeneve |
language |
English |
topic |
info:eu-repo/classification/ddc/500.2 Inflation Cosmological neutrinos Cosmological parameters from CMBR |
spellingShingle |
info:eu-repo/classification/ddc/500.2 Inflation Cosmological neutrinos Cosmological parameters from CMBR Benetti, Micol Gerbino, Martina Kinney, William H. Kolb, Edward W. Lattanzi, Massimiliano Melchiorri, Alessandro Pagano, Luca Riotto, Antonio Walter Cosmological data and indications for new physics |
topic_facet |
info:eu-repo/classification/ddc/500.2 Inflation Cosmological neutrinos Cosmological parameters from CMBR |
description |
Data from the Atacama Cosmology Telescope (ACT) and the South Pole Telescope (SPT), combined with the nine-year data release from the WMAP satellite, provide very precise measurements of the cosmic microwave background (CMB) angular anisotropies down to very small angular scales. Augmented with measurements from Baryonic Acoustic Oscillations surveys and determinations of the Hubble constant, we investigate whether there are indications for new physics beyond a Harrison-Zel'dovich model for primordial perturbations and the standard number of relativistic degrees of freedom at primordial recombination. All combinations of datasets point to physics beyond the minimal Harrison-Zel'dovich model in the form of either a scalar spectral index different from unity or additional relativistic degrees of freedom at recombination (e.g., additional light neutrinos). Beyond that, the extended datasets including either ACT or SPT provide very different indications: while the extended-ACT (eACT) dataset is perfectly consistent with the predictions of standard slow-roll inflation, the extended-SPT (eSPT) dataset prefers a non-power-law scalar spectral index with a very large variation with scale of the spectral index. Both eACT and eSPT favor additional light degrees of freedom. eACT is consistent with zero neutrino masses, while eSPT favors nonzero neutrino masses at more than 95% confidence. |
format |
Article in Journal/Newspaper |
author |
Benetti, Micol Gerbino, Martina Kinney, William H. Kolb, Edward W. Lattanzi, Massimiliano Melchiorri, Alessandro Pagano, Luca Riotto, Antonio Walter |
author_facet |
Benetti, Micol Gerbino, Martina Kinney, William H. Kolb, Edward W. Lattanzi, Massimiliano Melchiorri, Alessandro Pagano, Luca Riotto, Antonio Walter |
author_sort |
Benetti, Micol |
title |
Cosmological data and indications for new physics |
title_short |
Cosmological data and indications for new physics |
title_full |
Cosmological data and indications for new physics |
title_fullStr |
Cosmological data and indications for new physics |
title_full_unstemmed |
Cosmological data and indications for new physics |
title_sort |
cosmological data and indications for new physics |
publishDate |
2013 |
url |
https://archive-ouverte.unige.ch/unige:36485 |
long_lat |
ENVELOPE(158.317,158.317,-80.867,-80.867) |
geographic |
South Pole Hubble |
geographic_facet |
South Pole Hubble |
genre |
South pole |
genre_facet |
South pole |
op_source |
ISSN: 1475-7516 Journal of cosmology and astroparticle physics, vol. 2013, no. 10 (2013) p. 030-030 |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1088/1475-7516/2013/10/030 https://archive-ouverte.unige.ch/unige:36485 unige:36485 |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1088/1475-7516/2013/10/030 |
container_title |
Journal of Cosmology and Astroparticle Physics |
container_volume |
2013 |
container_issue |
10 |
container_start_page |
030 |
op_container_end_page |
030 |
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1778533621633646592 |