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Probing dark matter streams with CoGeNT
Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
2011 (English)In: Physical Review D, ISSN 1550-7998, Vol. 84, no 10, 103005- p.Article in journal (Refereed) Published
Abstract [en]

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 similar to 10 kg yr, the CoGeNT results can be expected to exclude the standard-halo-model-only halo in favor of a standard halo model + 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.

Place, publisher, year, edition, pages
2011. Vol. 84, no 10, 103005- p.
National Category
Astronomy, Astrophysics and Cosmology
URN: urn:nbn:se:su:diva-70653DOI: 10.1103/PhysRevD.84.103005ISI: 000297126700001OAI: diva2:482911
authorCount :3Available from: 2012-01-24 Created: 2012-01-23 Last updated: 2012-01-24Bibliographically approved

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Savage, Christopher
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