Search for an Annual Modulation in a P-type Point Contact Germanium Dark Matter Detector

Details Search for an Annual Modulation in a P-type Point Contact Germanium Dark Matter Detector Search for an Annual Modulation in a P-type Point Contact Germanium Dark Matter Detector

2011-06-03

arxiv.org/abs/1106.0650v3

Phys. Rev. Lett. 107 (2011) 141301

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

Published version, slightly expanded discussion of ROI uncertainties, one reference added

Scientific paper

Fifteen months of cumulative CoGeNT data are examined for indications of an annual modulation, a predicted signature of Weakly Interacting Massive Particle (WIMP) interactions. Presently available data support the presence of a modulated component of unknown origin, with parameters prima facie compatible with a galactic halo composed of light-mass WIMPs. Unoptimized estimators yield a statistical significance for a modulation of ~2.8 sigma, limited by the short exposure.

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