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arXiv · 1106.0650

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

C. E. Aalseth·P. S. Barbeau·J. Colaresi·J. I. Collar·J. Diaz Leon·J. E. Fast·N. Fields·T. W. Hossbach·M. E. Keillor·J. D. Kephart·A. Knecht·M. G. Marino·H. S. Miley·M. L. Miller·J. L. Orrell·D. C. Radford·J. F. Wilkerson·K. M. Yocum
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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 ~2.8 sigma, limited by the short exposure.

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C. E. Aalseth, P. S. Barbeau, J. Colaresi, J. I. Collar, J. Diaz Leon, J. E. Fast, N. Fields, T. W. Hossbach, M. E. Keillor, J. D. Kephart, A. Knecht, M. G. Marino, H. S. Miley, M. L. Miller, J. L. Orrell, D. C. Radford, J. F. Wilkerson, K. M. Yocum. 2011-10-04. Search for an Annual Modulation in a P-type Point Contact Germanium Dark Matter Detector. https://doi.org/10.1103/physrevlett.107.141301

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