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Astrophysics > Cosmology and Nongalactic Astrophysics

arXiv:1311.3422 (astro-ph)
[Submitted on 14 Nov 2013 (v1), last revised 9 May 2016 (this version, v3)]

Title:Measurement of Neutrino Masses from Relative Velocities

Authors:Hong-Ming Zhu, Ue-Li Pen, Xuelei Chen, Derek Inman, Yu Yu
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Abstract:We present a new technique to measure neutrino masses using their flow field relative to dark matter. 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.
Comments: 5 pages, 4 figures, 1 table, version2 with supplemental materials, v3 matches the published version
Subjects: Cosmology and Nongalactic Astrophysics (astro-ph.CO); High Energy Physics - Phenomenology (hep-ph)
Cite as: arXiv:1311.3422 [astro-ph.CO]
  (or arXiv:1311.3422v3 [astro-ph.CO] for this version)
  https://doi.org/10.48550/arXiv.1311.3422
Journal reference: Phys. Rev. Lett. 113, 131301 (2014)
Related DOI: https://doi.org/10.1103/PhysRevLett.113.131301

Submission history

From: Hong-Ming Zhu [view email]
[v1] Thu, 14 Nov 2013 08:57:58 UTC (104 KB)
[v2] Thu, 10 Jul 2014 21:05:46 UTC (129 KB)
[v3] Mon, 9 May 2016 20:03:40 UTC (92 KB)
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