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26 April 2024

» arxiv » 1002.4703

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Results from a Search for Light-Mass Dark Matter with a P-type Point Contact Germanium Detector
C.E. Aalseth ; P.S. Barbeau ; N.S. Bowden ; B. Cabrera-Palmer ; J. Colaresi ; J.I. Collar ; S. Dazeley ; P. de Lurgio ; G. Drake ; J.E. Fast ; N. Fields ; C.H. Greenberg ; T.W. Hossbach ; M.E. Keillor ; J.D. Kephart ; M.G. Marino ; H.S. Miley ; M.L. Miller ; J.L. Orrell ; D.C. Radford ; D. Reyna ; R.G.H. Robertson ; R.L. Talaga ; O. Tench ; T.D. Van Wechel ; J.F. Wilkerson ; K.M. Yocum ;
Date:	25 Feb 2010
Abstract:	We report on several features present in the energy spectrum from an ultra low-noise germanium detector operated at 2,100 m.w.e. By implementing a new technique able to reject surface events, a number of cosmogenic peaks can be observed for the first time. We discuss several possible causes for an irreducible excess of bulk-like events below 3 keVee, including a dark matter candidate common to the DAMA/LIBRA annual modulation effect, the hint of a signal in CDMS, and phenomenological predictions. Improved constraints are placed on a cosmological origin for the DAMA/LIBRA effect.
Source:	arXiv, 1002.4703
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