Dark Matter Detection with Polarized Detectors

Details Dark Matter Detection with Polarized Detectors Dark Matter Detection with Polarized Detectors

2012-02-08

arxiv.org/abs/1202.1807v1

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

4 pages, 5 figures

Scientific paper

We consider the prospects to use polarized dark-matter detectors to discriminate between various dark-matter models. If WIMPs are Dirac particles, with a particle-antiparticle asymmetry, and if those particles have neutrino-like parity-violating interactions with ordinary matter, then the recoil-direction and recoil-energy distributions of nuclei in detectors will depend on the orientation of the initial nuclear spin with respect to the velocity of the detector through the Galactic halo. If, however, WIMPS are scalars, Majorana fermions, or are matter-antimatter symmetric, no such signal can arise. Since the amplitude of this polarization modulation is fixed by the detector speed through the halo, in units of the speed of light, exposures several times larger than those of current experiments will be required to be probe this effect.

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