Neutrino Properties and the Cosmological Tensions in the $\Lambda$CDM Model

TL;DR

This paper reviews how cosmological measurements constrain neutrino properties, especially mass and effective number, and discusses their potential role in resolving tensions in the \\Lambda CDM model related to Hubble parameter and matter fluctuations.

Contribution

It provides an overview of current neutrino constraints from cosmology and explores their impact on existing cosmological tensions within the \\Lambda CDM framework.

Findings

Neutrino properties are tightly constrained by cosmological data.

Neutrinos may help alleviate discrepancies in Hubble constant measurements.

Potential of neutrinos to address small-scale matter fluctuation tensions.

Abstract

In this talk I will review the current status of the constraints on the neutrino properties from cosmological measurements, with a particular focus on their mass and effective number. I will also discuss the existing tensions within the context of the \lcdm\ model, including the discrepancies on the Hubble parameter and on the matter fluctuations at small scales, and how neutrinos could help to alleviate the aforementioned problems.