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Title: Search for MeV electron recoils from dark matter in EXO-200

Journal Article · · Physical Review D
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We present a search for electron-recoil signatures from the charged-current absorption of fermionic dark matter using the EXO-200 detector. We report an average electron-recoil background rate of 6.8 × 104 cts kg–1 yr–1 keV–1 above 4 MeV and find no statistically significant excess over our background projection. Using a total 136Xe exposure of 234.1 kg yr, we exclude new parameter space for the charged-current absorption cross section for dark matter masses between mχ=2.6–11.6 MeV with a minimum of 6 × 10–51 cm2 at 8.3 MeV at the 90% confidence level.

Research Organization:
Stanford Univ., CA (United States)
Sponsoring Organization:
USDOE
Contributing Organization:
EXO-200 Collaboration
Grant/Contract Number:
SC0017970
OSTI ID:
1922560
Alternate ID(s):
OSTI ID: 1992036
Journal Information:
Physical Review D, Journal Name: Physical Review D Vol. 107 Journal Issue: 1; ISSN 2470-0010
Publisher:
American Physical SocietyCopyright Statement
Country of Publication:
United States
Language:
English

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