Search for an annual modulation in a p-type Point Contact germanium dark matter detector.

  title={Search for an annual modulation in a p-type Point Contact germanium dark matter detector.},
  author={C. Aalseth and P. Barbeau and J. Colaresi and J. Collar and J. D. Diaz Leon and J. Fast and N. Fields and T. Hossbach and M. Keillor and J. Kephart and A. Knecht and M. Marino and H. Miley and M. Miller and J. Orrell and D. Radford and J. Wilkerson and K. Yocum},
  journal={Physical review letters},
  volume={107 14},
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. 
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