Cosmological measurement of neutrino masses from relative velocities

          @misc{ scivideos_PIRSA:15080010,
            doi = {10.48660/15080010},
            url = {https://pirsa.org/15080010},
            author = {Zhu, Hong-Ming},
            keywords = {Cosmology, Other Physics},
            language = {en},
            title = {Cosmological measurement of neutrino masses from relative velocities},
            publisher = {Perimeter Institute for Theoretical Physics},
            year = {2015},
            month = {aug},
            note = {PIRSA:15080010 see, \url{https://scivideos.org/pirsa/15080010}}
          }
          

Abstract

Present day streaming motions of neutrinos relative to dark matter and baryons are several hundred km/s, comparable with their thermal velocity dispersion. This results in a unique dipole anisotropic distortion of the matter-neutrino cross power spectrum, which is observable through the dipole distortion in the cross correlation of different galaxy populations. Such a dipole vanishes if not for this relative velocity and so it is a clean signature for neutrino mass. We estimate the size of this effect and find that current and future galaxy surveys may be sensitive to these signature distortions.