Calibrating the scintillation and ionization responses of xenon recoils for high-energy dark matter searches
- Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
- University of California, Davis, CA (United States)
- Stanford University, CA (United States)
- University of Maryland, College Park, MD (United States)
We report liquid xenon-based direct detection dark matter experiments have recently expanded their searches to include high-energy nuclear recoil events as motivated by effective field theory dark matter and inelastic dark matter interaction models, but few xenon recoil calibrations above 100 keV are currently available. In this work, we measured the scintillation and ionization yields of xenon recoils up to 426 keV. The experiment uses 14.1 MeV neutrons to scatter off xenon in a compact liquid xenon time projection chamber and produce quasimonoenergetic xenon recoils between 39 and 426 keV. We report the xenon recoil responses and their electric field dependence for recoil energies up to 306 keV; due to the low event statistics and the relatively mild field dependence, the yield values at higher energies are reported as the average of xenon responses for electric fields between 0.2 and 2.0 kV/cm. This result will enable xenon-based dark matter experiments to significantly increase their high-energy dark matter sensitivities by including energy regions that were previously inaccessible due to lack of calibrations.
- Research Organization:
- Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
- Sponsoring Organization:
- USDOE National Nuclear Security Administration (NNSA); USDOE Office of Science (SC), High Energy Physics (HEP)
- Grant/Contract Number:
- AC52-07NA27344; NA0000979
- OSTI ID:
- 1902006
- Report Number(s):
- LLNL-JRNL-837368; 1057192
- Journal Information:
- Physical Review. D., Journal Name: Physical Review. D. Journal Issue: 5 Vol. 106; ISSN 2470-0010
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
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