Inverted dipole feature in directional detection of exothermic dark matter
arXiv:1611.01750 · doi:10.1088/1475-7516/2017/01/052
Abstract
Directional dark matter detection attempts to measure the direction of motion of nuclei recoiling after having interacted with dark matter particles in the halo of our Galaxy. Due to Earth's motion with respect to the Galaxy, the dark matter flux is concentrated around a preferential direction. An anisotropy in the recoil direction rate is expected as an unmistakable signature of dark matter. The average nuclear recoil direction is expected to coincide with the average direction of dark matter particles arriving to Earth. Here we point out that for a particular type of dark matter, inelastic exothermic dark matter, the mean recoil direction as well as a secondary feature, a ring of maximum recoil rate around the mean recoil direction, could instead be opposite to the average dark matter arrival direction. Thus, the detection of an average nuclear recoil direction opposite to the usually expected direction would constitute a spectacular experimental confirmation of this type of dark matter.
arXiv comment8 pages, 3 figures
References in corpus (16)
- Inelastic Dark Matter
- Exciting Dark Matter and the INTEGRAL/SPI 511 keV signal
- The RAVE survey: the Galactic escape speed and the mass of the Milky Way
- A review of the discovery reach of directional Dark Matter detection
- Direct Detection of Multi-component Secluded WIMPs
- Exothermic Dark Matter
- Simulated Milky Way analogues: implications for dark matter direct searches
- Recoil momentum spectrum in directional dark matter detectors
- Simulated Milky Way analogues: implications for dark matter indirect searches
- A Model Independent Approach to Inelastic Dark Matter Scattering
- Inelastic Dark Matter and DAMA/LIBRA: An Experimentum Crucis
- Analytic study of the effect of dark energy-dark matter interaction on the growth of structures
- Ring-like features in directional dark matter detection
- Reevaluation of spin-dependent WIMP-proton interactions as an explanation of the DAMA data
- Direct Detection of Light "Ge-phobic" Exothermic Dark Matter
- Direct Detection of Exothermic Dark Matter with Light Mediator