Cosmological Constraints on Neutrino Mass within Consistent Cosmological Models

Abstract

Recently, the emergence of cosmological tension has raised doubts about the consistency of the $\Lambda$CDM model. In order to constrain the neutrino mass within a consistent cosmological framework, we investigate three massive neutrinos with normal hierarchy (NH) and inverted hierarchy (IH) in both the axion-like EDE (Axi-EDE) model and the AdS-EDE model. We use the joint datasets including cosmic microwave background (CMB) power spectrum from Planck 2018, Pantheon of type Ia supernova, baryon acoustic oscillation (BAO) and $H_0$ data from SH0ES. For the $\nu$Axi-EDE model, we obtain $\sum m_{\nu ,\mathrm{NH}}<0.152$ eV and $\sum m_{\nu ,\mathrm{IH}}<0.178$ eV, while for the $\nu$AdS-EDE model, we find $\sum m_{\nu ,\mathrm{NH}}<0.135$ eV and $\sum m_{\nu ,\mathrm{IH}}<0.167$ eV. Our results exhibit a preference for the normal hierarchy in both the $\nu$Axi-EDE model and the $\nu$AdS-EDE model.

8 pages, 2 figures and 1 table