The NRDD_constraints tool provides simple interpolating functions written in Python that return the most constraining limit on the dark matter-nucleon scattering cross section for a list of non-relativistic effective operators. The package contains four files: the main code, NRDD_constraints.py; a simple driver, NRDD_constraints-example.py; and two data files, NRDD_data1.npy and NRDD_data2.npy
https://ui.adsabs.harvard.edu/abs/2019APh...109...50K and https://ui.adsabs.harvard.edu/abs/2020APh...114...80K