21cm fluctuations in the dark ages and cosmic heat flows

          @misc{ scivideos_PIRSA:15080003,
            doi = {10.48660/15080003},
            url = {https://pirsa.org/15080003},
            author = {Ali-Haimoud, Yacine},
            keywords = {Cosmology, Other Physics},
            language = {en},
            title = {21cm fluctuations in the dark ages and cosmic heat flows},
            publisher = {Perimeter Institute for Theoretical Physics},
            year = {2015},
            month = {aug},
            note = {PIRSA:15080003 see, \url{https://scivideos.org/index.php/pirsa/15080003}}
          }
          

Abstract

The spin-flip transition in neutral hydrogen may be used to probe large-scale structure at high redshifts, before the first luminous objects formed. The huge number of modes potentially accessible make this a very promising avenue. I will discuss several key unknowns that could be measured with high-redshift 21cm surveys: primordial non-gaussianity, the primordial small-scale power spectrum, and dark-matter-baryon interactions. I will close by discussing CMB spectral distortions, another promising probe of early Universe physics, and illustrate how they can be used to test dark-matter interactions with standard model particles.