Sensitivity of sodium iodide cryogenic scintillation-phonon detectors to WIMP signals

[摘要] There is great interest in performing dark matter direct detection experiments using alkali halides such as NaI to test the DAMA/LIBRA claim. Cryogenic scintillation-phonon detectors measure both scintillation light and phonons to provide event-by-event discrimination between particles interacting with nuclei and particles interacting with electrons. An alkali halide scintillation-phonon detector could test the DAMA/LIBRA claim in a model-independent way using a similar material with added background discrimination. We present simulations of such detectors to determine their possible sensitivity to both annual modulation and particle interaction signals. We find that a 5 kg detector array could test the modulation reported by DAMA/LIBRA within 2 years using a likelihood-ratio test.

[发布机构] Department of Physics, Engineering Physics and Astronomy, Queens University, Kingston; ON; K7L 3N6, Canada^1;Physik-Department E15, Technische Universität München, Garching; 85748, Germany^2;Albert Einstein Center for Fundamental Physics, University of Bern, Bern; 3012, Switzerland^3;Perimeter Institute for Theoretical Physics, 31 Caroline St. N, Waterloo; ON; N2L 2Y5, Canada^4

[效力级别] 天文学 [学科分类] 天文学(综合)

[关键词] Annual modulations;Background discrimination;Detector arrays;Direct detection;Likelihood ratio tests;Model independent;Scintillation light;Similar material