Journal
PHYSICAL REVIEW D
Volume 102, Issue 12, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.102.121303
Keywords
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Funding
- Ministry of Science and Technology [108-2112-M-259-003, 108-2112-M-002-003-MY3]
- National Center for Theoretical Sciences [2019-20/ECP-2]
- Kenda Foundation of Taiwan
- Canada First Research Excellence Fund through the Arthur B. McDonald Canadian Astroparticle Physics Research Institute
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The Migdal effect in a dark-matter-nucleus scattering extends the direct search experiments to the subGeV mass region through electron ionization with sub-keV detection thresholds. In this paper, we derive a rigorous and model-independent Migdal-photoabsorption relation that links the sub-keV Migdal process to photoabsorption. This relation is free of theoretical uncertainties as it only requires the photoabsorption cross section as the experimental input. Validity of this relation is explicitly checked in the case of xenon with a state-of-the-art atomic calculation that is well benchmarked by experiments. The predictions based on this relation for xenon, argon, semiconductor silicon, and germanium detectors are presented and discussed.
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