Probing dark matter streams with CoGeNT

Abstract

We examine the future sensitivity of CoGeNT to the presence of dark matter streams and find that consideration of streams in the data may lead to differences in the interpretation of the results. We show the allowed particle mass and cross section for different halo parameters, assuming spin-independent elastic scattering. As an example, we choose a stream with the same velocity profile as that of the Sagittarius stream (and in the Solar neighborhood) and find that, with an exposure of $\sim$ 10 kg year, the CoGeNT results can be expected to exclude the SHM-only halo in favor of an SHM+stream halo at the 95% (99.7%) confidence level provided the stream contributes 3% (5%) of the local dark matter density. The presence of a significant stream component may result in incorrect estimates of the particle mass and cross section unless the presence of the stream is taken into account. We conclude that the CoGeNT experiment is sensitive to streams and care should be taken to include the possibility of streams when analyzing experimental results.

Main conclusions unchanged. Discussion on CoGeNT annual modulation included. Manuscript expanded and citations added. Accepted in Physical Review D

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Cited by in corpus (17)

• Annual Modulation of Dark Matter: A Review
• Unitarity and Monojet Bounds on Models for DAMA, CoGeNT, and CRESST-II
• Resolving astrophysical uncertainties in dark matter direct detection
• Toward A Consistent Picture For CRESST, CoGeNT and DAMA
• Direct Detection of Dark Matter Debris Flows
• Dark Matter Direct Search Rates in Simulations of the Milky Way and Sagittarius Stream
• Light Dark Matter in the light of CRESST-II
• Probing the Local Velocity Distribution of WIMP Dark Matter with Directional Detectors
• On the annual modulation signal in dark matter direct detection
• Direct dark matter searches - Test of the Big Bounce Cosmology
• An optimistic CoGeNT analysis
• Evidence for dark matter modulation in CoGeNT?
• Harmonics in the Dark-Matter Sky: Directional Detection in the Fourier-Bessel Basis
• Halo-independent tests of dark matter annual modulation signals
• Debris Flows in Direct Dark Matter Searches-The modulation effect
• Integrating In Dark Matter Astrophysics at Direct Detection Experiments
• Probing light WIMPs with directional detection experiments