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A Maximum Likelihood Analysis of Low-Energy CDMS Data

2012/04/16 by J. I. Collar, Collar, J. I., N.E. Fields +2 · 2 citations
Physics and Astronomy · #Atomic and Subatomic Physics Research #Cosmology and Nongalactic Astrophysics (astro-ph.CO) #Dark Matter and Cosmic Phenomena #FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #Instrumentation and Detectors (physics.ins-det) #Scientific Research and Discoveries #astro-ph.CO #hep-ex #physics.ins-det

paper · pdf · doi:10.48550/arxiv.1204.3559

5 pages, 4 figures v2: minor additions only v3: expanded discussion on surface events (pg. 3)

openalex publication_date 2012/04/16 · arxiv created 2012/04/22 · arxiv updated 2012/04/24 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

An unbinned maximum likelihood analysis of CDMS low-energy data reveals a strong preference (5.7 sigma C.L.) for a model containing an exponential excess of events in the nuclear recoil band, when compared to the null hypothesis. We comment on the possible origin of such an excess, establishing a comparison with anomalies in other dark matter experiments. A recent annual modulation search in CDMS data is shown to be insufficiently sensitive to test a dark matter origin for this excess.

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