2014/01/14 by C.E. Aalseth, C. E. Aalseth, Aalseth, C. E. +29 · 2 citations
Physics and Astronomy · #Cosmology and Gravitation Theories #Cosmology and Nongalactic Astrophysics (astro-ph.CO) #Dark Matter and Cosmic Phenomena #FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #High Energy Physics - Phenomenology (hep-ph) #Scientific Research and Discoveries #astro-ph.CO #hep-ex #hep-ph
paper · pdf · doi:10.48550/arxiv.1401.3295
Three datasets and note on usage included as ancillary files
arxiv created 2014/01/14 · openalex publication_date 2014/01/14 · arxiv updated 2014/01/15 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Weakly Interacting Massive Particles (WIMPs) are well-established dark matter candidates. WIMP interactions with sensitive detectors are expected to display a characteristic annual modulation in rate. We release a dataset spanning 3.4 years of operation from a low-background germanium detector, designed to search for this signature. A previously reported modulation persists, concentrated in a region of the energy spectrum populated by an exponential excess of unknown origin. Its phase and period agree with phenomenological expectations, but its amplitude is a factor ∼4-7 larger than predicted for a standard WIMP galactic halo. We consider the possibility of a non-Maxwellian local halo velocity distribution as a plausible explanation, able to help reconcile recently reported WIMP search anomalies.