# Invisibles 2021 Workshop

May 31, 2021 to June 4, 2021
Online

## Easing the sigma8-tension with nu-DM interactions

Jun 4, 2021, 3:30 PM
6m
Online

#### Online

PhD forum talk + poster

### Speaker

Markus Rasmussen Mosbech (The University of Sydney)

### Description

The $\sigma_8$-tension of Planck data with weak lensing and redshift surveys is one of the main problems with the $\Lambda$CDM model of cosmology. We show that the tension can be alleviated by introducing an interaction between dark matter and neutrinos. We model the interaction using a linear Boltzmann treatment, introducing a novel implementation that for the first time uses the full massive neutrino hierarchy. We also provide upper limits on the interaction cross-section between neutrinos and dark matter.

 arXiv number (if applicable) 2011.04

### Primary author

Markus Rasmussen Mosbech (The University of Sydney)

### Presentation materials

 Invisibles21_Poster_final.pdf Invisibles21_Presentation.pdf