Neutrino Mass Bounds in the era of Tension Cosmology

Abstract

The measurements of Cosmic Microwave Background anisotropies made by the Planck satellite provide extremely tight upper bounds on the total neutrino mass scale ($\Sigma m_{\nu }<0.26eV$ at $95\%$ C.L.). However, as recently discussed in the literature, Planck data show anomalies that could affect this result. Here we provide new constraints on neutrino masses using the recent and complementary CMB measurements from the Atacama Cosmology Telescope DR4 and the South Polar Telescope SPT-3G experiments. We found that both the ACT-DR4 and SPT-3G data, when combined with WMAP, mildly suggest a neutrino mass with $\Sigma m_{\nu }=0.68\pm 0.31$ eV and $\Sigma m_{\nu }=0.46_{-0.36}^{+0.14}$ eV at $68\%$ C.L, respectively. Moreover, when CMB lensing from the Planck experiment is included, the ACT-DR4 data now indicates a neutrino mass above the two standard deviations, with $\Sigma m_{\nu }=0.60_{-0.50}^{+0.44}$ eV at $95\%$, while WMAP+SPT-3G provides a weak upper limit of $\Sigma m_{\nu }<0.37$ eV at $68\%$ C.L.. Interestingly, these results are consistent with the Planck CMB+Lensing constraint of $\Sigma m_{\nu }=0.41_{-0.25}^{+0.17}$ eV at $68\%$ C.L. when variation in the $A_{\mathrm{lens}}$ parameter are considered. We also show that these indications are still present after the inclusion of BAO or SN-Ia data in extended cosmologies that are usually considered to solve the so-called Hubble tension. A combination of ACT-DR4, WMAP, BAO and constraints on the Hubble constant from the SH0ES collaboration gives $\Sigma m_{\nu }=0.39_{-0.25}^{+0.13}$ eV at $68\%$ C.L. in extended cosmologies. We conclude that a total neutrino mass above the $0.26$ eV limit still provides an excellent fit to several cosmological data and that future data must be considered before safely ruling it out.

6 pages, 3 Figures

References in corpus (17)

• In the Realm of the Hubble tension $-$ a Review of Solutions
• The Clustering of the SDSS DR7 Main Galaxy Sample I: A 4 per cent Distance Measure at z=0.15
• Tensions between the Early and the Late Universe
• Massive neutrinos and cosmology
• Cosmic Distances Calibrated to 1% Precision with Gaia EDR3 Parallaxes and Hubble Space Telescope Photometry of 75 Milky Way Cepheids Confirm Tension with LambdaCDM
• Phenomenology with Massive Neutrinos
• The Atacama Cosmology Telescope: DR4 Maps and Cosmological Parameters
• Measurements of the Hubble Constant: Tensions in Perspective
• Cosmology Intertwined II: The Hubble Constant Tension
• An improved upper limit on the neutrino mass from a direct kinematic method by KATRIN
• Cosmology Intertwined III: $f{\sigma }_8$ and $S_8$
• Measurements of the E-Mode Polarization and Temperature-E-Mode Correlation of the CMB from SPT-3G 2018 Data
• Cosmic Microwave Weak lensing data as a test for the dark universe
• Investigating Cosmic Discordance
• Cosmological constraints in extended parameter space from the Planck 2018 Legacy release
• On the most constraining cosmological neutrino mass bounds
• Cosmological constraints on slow-roll inflation: an update

Cited by in corpus (9)

• Challenges for $\Lambda$CDM: An update
• Restoring cosmological concordance with early dark energy and massive neutrinos?
• A fast test to assess the impact of marginalization in Monte Carlo analyses, and its application to cosmology
• Quantifying the global "CMB tension" between the Atacama Cosmology Telescope and the Planck satellite in extended models of cosmology
• Confronting interacting dark radiation scenarios with cosmological data
• Implications of an extended dark energy model with massive neutrinos
• X-ray cluster cosmology
• Neutrino mass and kinetic gravity braiding degeneracies
• Revisiting the Universal Texture Zero of Flavour: a Markov Chain Monte Carlo Analysis