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Relation between the Migdal Effect and Dark Matter-Electron Scattering in Isolated Atoms and Semiconductors
Physical Review Letters ( IF 9.227 ) Pub Date : 2020-01-13 , DOI: 10.1103/physrevlett.124.021801
Rouven Essig, Josef Pradler, Mukul Sholapurkar, and Tien-Tien Yu

A key strategy for sub-GeV dark matter direct detection is searches for small ionization signals that arise from dark matter-electron scattering or from the “Migdal” effect in dark matter-nucleus scattering. We show that the theoretical description of both processes is closely related, allowing for a principal mapping between them. We explore this for noble-liquid targets and, for the first time, estimate the Migdal effect in semiconductors using a crystal form factor. We present new constraints using XENON10, XENON100, and SENSEI data, and give projections for proposed experiments.
更新日期:2020-01-14

 

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