Search for an Annual Modulation in a p-Type Point Contact Germanium Dark Matter Detector
Abstract
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 ∼2.8σ, limited by the short exposure.
- Publication:
-
Physical Review Letters
- Pub Date:
- September 2011
- DOI:
- 10.1103/PhysRevLett.107.141301
- arXiv:
- arXiv:1106.0650
- Bibcode:
- 2011PhRvL.107n1301A
- Keywords:
-
- 95.35.+d;
- 29.40.Wk;
- 95.55.Vj;
- Dark matter;
- Solid-state detectors;
- Neutrino muon pion and other elementary particle detectors;
- cosmic ray detectors;
- Astrophysics - Cosmology and Extragalactic Astrophysics;
- High Energy Physics - Experiment
- E-Print:
- Published version, slightly expanded discussion of ROI uncertainties, one reference added