PIRSA:16090046

Testing dark matter with Stage-IV CMB experiments

Marsh, D. (2016). Testing dark matter with Stage-IV CMB experiments. Perimeter Institute. https://pirsa.org/16090046

Marsh, David. Testing dark matter with Stage-IV CMB experiments. Perimeter Institute, Sep. 13, 2016, https://pirsa.org/16090046 

          @misc{ pirsa_PIRSA:16090046,
            doi = {10.48660/16090046},
            url = {https://pirsa.org/16090046},
            author = {Marsh, David},
            keywords = {Cosmology},
            language = {en},
            title = {Testing dark matter with Stage-IV CMB experiments},
            publisher = {Perimeter Institute},
            year = {2016},
            month = {sep},
            note = {PIRSA:16090046 see, \url{https://pirsa.org}}
          }

David Marsh

King's College London

Talk number
PIRSA:16090046
Collection
Talk Type
Subject
Abstract

In the coming decade, ground based CMB telescopes could face a substantial upgrade, to so-called CMB-S4. There are two main science drivers behind this initiative: B-modes, and neutrino mass, and I will focus on the latter. Thought of more generally, constraints on neutrinos can be thought of as generic tests of dark matter. I will discuss the prospects for CMB-S4 in the dark sector, with emphasis on searches for axions and neutrinos. It will be possible to detect percent level departures from standard cold dark matter at many sigma over a wide range of scales: a vast improvement over Planck (+ existing ground based). A large part of the improvement over Planck comes from precision lensing measurements at high multipole. I will briefly discuss some technical challenges in this measurement, based on modelling of dark matter clustering in the non-linear regime.