Search for an annual modulation in a p-type Point Contact germanium dark matter detector |
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| Authors: | Aalseth C E,Barbeau P S,Colaresi J,Collar J I,Diaz Leon J,Fast J E,Fields N,Hossbach T W,Keillor M E,Kephart J D,Knecht A,Marino M G,Miley H S,Miller M L,Orrell J L,Radford D C,Wilkerson J F,Yocum K M CoGeNT Collaboration |
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| Affiliation: | Pacific Northwest National Laboratory, Richland, Washington 99352, USA. |
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| 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. |
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