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

14th International Conference on Topics in Astroparticle and Underground Physics

物理学;天文学

Clark, M.^1 ; Nadeau, P.^1 ; Di Stefano, P.C.F.^1 ; Lanfranchi, J.-C.^2 ; Roth, S.^1 ; Von Sivers, M.^3 ; Yavin, I.^4

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

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

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/718/4/042015/pdf
DOI  :  10.1088/1742-6596/718/4/042015

学科分类：天文学(综合)

来源: IOP

【 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.