Pseudoscalar sterile neutrino self-interactions in light of Planck, SPT and ACT data
We reassess the viability of a cosmological model including a fourth additional sterile neutrino species that self-interacts through a new pseudoscalar degree of freedom. To that end, we perform a series of extensive analyses fitting various combinations of cosmic microwave background (CMB) data fro...
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ftdatacite:10.48550/arxiv.2112.00037 2023-05-15T18:23:15+02:00 Pseudoscalar sterile neutrino self-interactions in light of Planck, SPT and ACT data Corona, Mattia Atzori Murgia, Riccardo Cadeddu, Matteo Archidiacono, Maria Gariazzo, Stefano Giunti, Carlo Hannestad, Steen 2021 https://dx.doi.org/10.48550/arxiv.2112.00037 https://arxiv.org/abs/2112.00037 unknown arXiv Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode cc-by-4.0 CC-BY Cosmology and Nongalactic Astrophysics astro-ph.CO High Energy Physics - Phenomenology hep-ph FOS Physical sciences Article CreativeWork article Preprint 2021 ftdatacite https://doi.org/10.48550/arxiv.2112.00037 2022-03-10T13:18:53Z We reassess the viability of a cosmological model including a fourth additional sterile neutrino species that self-interacts through a new pseudoscalar degree of freedom. To that end, we perform a series of extensive analyses fitting various combinations of cosmic microwave background (CMB) data from Planck, the Atacama Cosmology Telescope (ACT) and the South Pole Telescope (SPT), both alone and in combination with Baryon Acoustic Oscillation (BAO) and Supernova Ia (SnIa) observations. We show that the scenario under study, although capable to resolve the Hubble tension without worsening the so-called $S_8$ tension about the growth of structures, is severely constrained by high-multipole polarization data from both Planck and SPT. Intriguingly, when trading Planck TE-EE data for those from ACT, we find a $\gtrsim 3 σ$ preference for a non-zero sterile neutrino mass, $m_s=3.6^{+1.1}_{-0.6}$ eV (68% C.L.), compatible with the range suggested by longstanding short-baseline (SBL) anomalies in neutrino oscillation experiments. The preference is mostly driven by ACT favouring a higher value for the primordial spectral index $n_s$ with respect to Planck and SPT. The pseudoscalar model appears indeed to provide a better fit to ACT data with respect to $Λ$CDM ($Δχ^2 \simeq -5$). In particular, we show that the mild tension between Planck and ACT is due to the different pattern in the TE and EE power spectra on multipoles between $350 \lesssim \ell \lesssim 1000$. We also check the impact of marginalizing over the gravitational lensing information in Planck data, showing that the model does not solve the CMB lensing anomaly. Future work including higher precision data from current and upcoming CMB ground-based experiments will be crucial to test these results. : 30 pages, 12 figures, 7 tables. Comments are welcome. v2: typos corrected, references added Article in Journal/Newspaper South pole DataCite Metadata Store (German National Library of Science and Technology) South Pole Hubble ENVELOPE(158.317,158.317,-80.867,-80.867) |
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DataCite Metadata Store (German National Library of Science and Technology) |
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unknown |
topic |
Cosmology and Nongalactic Astrophysics astro-ph.CO High Energy Physics - Phenomenology hep-ph FOS Physical sciences |
spellingShingle |
Cosmology and Nongalactic Astrophysics astro-ph.CO High Energy Physics - Phenomenology hep-ph FOS Physical sciences Corona, Mattia Atzori Murgia, Riccardo Cadeddu, Matteo Archidiacono, Maria Gariazzo, Stefano Giunti, Carlo Hannestad, Steen Pseudoscalar sterile neutrino self-interactions in light of Planck, SPT and ACT data |
topic_facet |
Cosmology and Nongalactic Astrophysics astro-ph.CO High Energy Physics - Phenomenology hep-ph FOS Physical sciences |
description |
We reassess the viability of a cosmological model including a fourth additional sterile neutrino species that self-interacts through a new pseudoscalar degree of freedom. To that end, we perform a series of extensive analyses fitting various combinations of cosmic microwave background (CMB) data from Planck, the Atacama Cosmology Telescope (ACT) and the South Pole Telescope (SPT), both alone and in combination with Baryon Acoustic Oscillation (BAO) and Supernova Ia (SnIa) observations. We show that the scenario under study, although capable to resolve the Hubble tension without worsening the so-called $S_8$ tension about the growth of structures, is severely constrained by high-multipole polarization data from both Planck and SPT. Intriguingly, when trading Planck TE-EE data for those from ACT, we find a $\gtrsim 3 σ$ preference for a non-zero sterile neutrino mass, $m_s=3.6^{+1.1}_{-0.6}$ eV (68% C.L.), compatible with the range suggested by longstanding short-baseline (SBL) anomalies in neutrino oscillation experiments. The preference is mostly driven by ACT favouring a higher value for the primordial spectral index $n_s$ with respect to Planck and SPT. The pseudoscalar model appears indeed to provide a better fit to ACT data with respect to $Λ$CDM ($Δχ^2 \simeq -5$). In particular, we show that the mild tension between Planck and ACT is due to the different pattern in the TE and EE power spectra on multipoles between $350 \lesssim \ell \lesssim 1000$. We also check the impact of marginalizing over the gravitational lensing information in Planck data, showing that the model does not solve the CMB lensing anomaly. Future work including higher precision data from current and upcoming CMB ground-based experiments will be crucial to test these results. : 30 pages, 12 figures, 7 tables. Comments are welcome. v2: typos corrected, references added |
format |
Article in Journal/Newspaper |
author |
Corona, Mattia Atzori Murgia, Riccardo Cadeddu, Matteo Archidiacono, Maria Gariazzo, Stefano Giunti, Carlo Hannestad, Steen |
author_facet |
Corona, Mattia Atzori Murgia, Riccardo Cadeddu, Matteo Archidiacono, Maria Gariazzo, Stefano Giunti, Carlo Hannestad, Steen |
author_sort |
Corona, Mattia Atzori |
title |
Pseudoscalar sterile neutrino self-interactions in light of Planck, SPT and ACT data |
title_short |
Pseudoscalar sterile neutrino self-interactions in light of Planck, SPT and ACT data |
title_full |
Pseudoscalar sterile neutrino self-interactions in light of Planck, SPT and ACT data |
title_fullStr |
Pseudoscalar sterile neutrino self-interactions in light of Planck, SPT and ACT data |
title_full_unstemmed |
Pseudoscalar sterile neutrino self-interactions in light of Planck, SPT and ACT data |
title_sort |
pseudoscalar sterile neutrino self-interactions in light of planck, spt and act data |
publisher |
arXiv |
publishDate |
2021 |
url |
https://dx.doi.org/10.48550/arxiv.2112.00037 https://arxiv.org/abs/2112.00037 |
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_rights |
Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode cc-by-4.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.48550/arxiv.2112.00037 |
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1766202799405662208 |