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Title: First search for a dark matter annual modulation signal with NaI(Tl) in the Southern Hemisphere by DM-Ice17

Journal Article · · Physical Review D

In this study, the first search for a dark matter annual modulation signal with NaI(Tl) target material in the Southern Hemisphere conducted with the DM-Ice17 experiment is presented. DM-Ice17 consists of 17 kg of NaI(Tl) scintillating crystal under 2200 m.w.e. overburden of Antarctic glacial ice. The analysis presented here utilizes a 60.8 kg yr exposure. While unable to exclude the signal reported by DAMA/LIBRA, the DM-Ice17 data are consistent with no modulation in the energy range of 4-20 keV, providing the strongest limits on WIMP candidates from a direct detection experiment located in the Southern Hemisphere. Additionally, the successful deployment and stable operation of 17 kg of NaI(Tl) crystal over 3.5 years establishes the South Pole ice as a viable location for future underground, low-background experiments.

Research Organization:
Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA)
Contributing Organization:
DM-Ice Collaboration
Grant/Contract Number:
AC02-07CH11359
OSTI ID:
1253581
Report Number(s):
FERMILAB--PUB-16-043-AE; arXiv:1602.05939; 1422186
Journal Information:
Physical Review D, Journal Name: Physical Review D Journal Issue: 3 Vol. 95; ISSN PRVDAQ; ISSN 2470-0010
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

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