Atomic Many-body Approaches for Constraining DM-electron Interactions

2 Sep 2021, 17:10
Talk in parallel session Dark Matter and its detection Discussion Panel Dark Matter 8


Chih-Pan Wu (Université de Montréal)


Detectors with low thresholds for electron recoil (ER) open a new window to direct searches of sub-GeV dark matter (DM) candidates. These experimental studies need important theory inputs: the DM scattering rates at detectors through some assumed DM-electron interactions. In this talk, I will present the results of our study on DM-atom scattering through DM-electron interactions at leading order in the context of effective field theory. Our atomic many-body approach is properly benchmarked by atomic data involving not only bound but also continuum states, with a conservative 20% error estimate for DM-xenon and DM-germanium scattering with ER above 12 and 80 eV, respectively. Compared with conventional approaches based on non-relativistic, independent-particle frameworks, the importance of relativistic effects and many-body correlation will be highlighted and discussed.

Reference to paper (DOI or arXiv) 10.1103/PhysRevD.102.123025

Primary author

Chih-Pan Wu (Université de Montréal)

Presentation Materials

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