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Constraints from a many-body method on spin-independent dark matter scattering off electrons using data from germanium and xenon detectors

Authors :
Mukesh K. Pandey
Lakhwinder Singh
Hsin-Chang Chi
C.-P. Liu
Chih-Pan Wu
Chung-Chun Hsieh
Henry T. Wong
Jiunn-Wei Chen
Source :
Physical Review
Publication Year :
2020
Publisher :
American Physical Society (APS), 2020.

Abstract

Scattering of light dark matter (LDM) particles with atomic electrons is studied in the context of effective field theory. Contact and long-range interactions between dark matter and an electron are both considered. A state-of-the-art many-body method is used to evaluate the spin-independent atomic ionization cross sections of LDM-electron scattering, with an estimated error about 20%. New upper limits are derived on parameter space spanned by LDM mass and effective coupling strengths using data from the CDMSlite, XENON10, XENON100, and XENON1T experiments. Comparison with existing calculations shows the importance of atomic structure. Two aspects particularly important are relativistic effect for inner-shell ionization and final-state free electron wave function which sensitively depends on the underlying atomic approaches.<br />Comment: Update to the final publication version, largely expanded with new data analyzed and improved physics discussions. Data files and README are provided in the ancillary folder

Details

ISSN :
24700029 and 24700010
Volume :
102
Database :
OpenAIRE
Journal :
Physical Review D
Accession number :
edsair.doi.dedup.....4bb0141ba802e2c5f3ad2598e642b236
Full Text :
https://doi.org/10.1103/physrevd.102.123025