Crystal responses to general dark matter-electron interactions

Paper in proceeding, 2022

In [1] we develop a non-relativistic effective field theory (NR-EFT) based framework with which rates of dark matter (DM) induced electron hole pair creation in silicon and germanium crystals can be obtained for any form of non-relativistic DM-electron interactions with spin 1/2 DM. We find that the crystal physics is captured by 5 crystal response functions, 4 of which are novel to that work, and we evaluate them using a state of the art DFT calculation.