Multi-channel direct detection of light dark matter: theoretical framework

@article{Trickle2020MultichannelDD,
  title={Multi-channel direct detection of light dark matter: theoretical framework},
  author={Tanner Trickle and Zhengkang Zhang and Kathryn M. Zurek and Katherine Inzani and Sin{\'e}ad M. Griffin},
  journal={Journal of High Energy Physics},
  year={2020},
  volume={2020},
  pages={1-36}
}
We present a unified theoretical framework for computing spin-independent direct detection rates via various channels relevant for sub-GeV dark matter — nuclear re- coils, electron transitions and single phonon excitations. Despite the very different physics involved, in each case the rate factorizes into the particle-level matrix element squared, and an integral over a target material- and channel-specific dynamic structure factor. We show how the dynamic structure factor can be derived in all… 
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