Search for MeV Electron Recoils from Dark Matter in EXO-200

Abstract

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 $6.8\times 10^{-4}\mathrm{cts}{\mathrm{kg}}^{-1}{\mathrm{yr}}^{-1}{\mathrm{keV}}^{-1}$ above $4\mathrm{MeV}$ and find no statistically significant excess over our background projection. Using a total ${}^{136}\mathrm{Xe}$ exposure of $234.1\mathrm{kg}\mathrm{yr}$ we exclude new parameter space for the charged-current absorption cross-section for dark matter masses between $m_{\chi }=2.6\mathrm{MeV}-11.6\mathrm{MeV}$ with a minimum of $6\times 10^{-51}{\mathrm{cm}}^2$ at $8.3\mathrm{MeV}$ at the $90\%$ confidence level.

arXiv comment9 pages, 6 figures, 1 table

References in corpus (31)

• Dark Matter Search Results from a One Tonne$\times$Year Exposure of XENON1T
• Results from a search for dark matter in the complete LUX exposure
• Experimental Searches for the Axion and Axion-like Particles
• Neutrinoless Double-Beta Decay: Status and Prospects
• Dark Matter Search Results from the PandaX-4T Commissioning Run
• Direct Detection of WIMP Dark Matter: Concepts and Status
• DARWIN: towards the ultimate dark matter detector
• Constraining Light Dark Matter with Diffuse X-Ray and Gamma-Ray Observations
• Projected WIMP sensitivity of the LUX-ZEPLIN (LZ) dark matter experiment
• Search for Neutrinoless Double-Beta Decay with the Complete EXO-200 Dataset
• Projected WIMP Sensitivity of the XENONnT Dark Matter Experiment
• Search for Neutrinoless Double-Beta Decay with the Upgraded EXO-200 Detector
• An improved measurement of the 2νββ half-life of Xe-136 with EXO-200
• NEXO: Neutrinoless double beta decay search beyond $10^{28}$ year half-life sensitivity
• Dark matter direct search sensitivity of the PandaX-4T experiment
• The EXO-200 detector, part I: Detector design and construction
• Correlated Fluctuations between Luminescence and Ionization in Liquid Xenon
• Direct Detection Signals from Absorption of Fermionic Dark Matter
• Absorption of Fermionic Dark Matter by Nuclear Targets
• A Search for Light Fermionic Dark Matter Absorption on Electrons in PandaX-4T
• Interplay of the LHC and non-LHC Dark Matter searches in the Effective Field Theory approach
• Investigation of radioactivity-induced backgrounds in EXO-200
• Measurement of the scintillation and ionization response of liquid xenon at MeV energies in the EXO-200 experiment
• Resonant scattering and recombination of pseudo-degenerate WIMPs
• First search for the absorption of fermionic dark matter with the PandaX-4T experiment
• Cosmogenic Backgrounds to 0νββ in EXO-200
• Kiloton-scale xenon detectors for neutrinoless double beta decay and other new physics searches
• Solar neutrino detection in liquid xenon detectors via charged-current scattering to excited states
• Direct constraints on charged excitations of dark matter
• The EXO-200 detector, part II: Auxiliary Systems
• Measurement of the Spectral Shape of the beta-decay of 137Xe to the Ground State of 137Cs in EXO-200 and Comparison with Theory

Cited by in corpus (7)

• NGC 1068 constraints on neutrino-dark matter scattering
• ${}^{138}\mathrm{Ba}(d,\alpha )$ study of states in ${}^{136}\mathrm{Cs}$: Implications for new physics searches with xenon detectors
• Exotic dark matter search with the Majorana Demonstrator
• Observation of low-lying isomeric states in ${}^{136}$Cs: a new avenue for dark matter and solar neutrino detection in xenon detectors
• Incoherent Fermionic Dark Matter Absorption with Nucleon Fermi Motion
• Canadian Contributions to the Search for Neutrinoless Double Beta Decay
• Constraints on Fermionic Dark Matter Absorption from Radiochemical Solar-Neutrino Measurements