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Measurement of Neutrino Masses from Relative Velocities
- Publication Year :
- 2013
-
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.<br />5 pages, 4 figures, 1 table, version2 with supplemental materials, v3 matches the published version
- Subjects :
- Physics
Cosmology and Nongalactic Astrophysics (astro-ph.CO)
Dark matter
FOS: Physical sciences
General Physics and Astronomy
Velocity dispersion
Astrophysics
Astrophysics::Cosmology and Extragalactic Astrophysics
Galaxy
Baryon
Dipole
High Energy Physics - Phenomenology
High Energy Physics - Phenomenology (hep-ph)
Thermal velocity
Distortion
Neutrino
Astrophysics - Cosmology and Nongalactic Astrophysics
Subjects
Details
- Language :
- English
- Database :
- OpenAIRE
- Accession number :
- edsair.doi.dedup.....69b84f62f0e60848ea3a903bd1881c2f