A fermionic dark matter particle interacting mainly with third-generation fermions is allowed by current direct-detection bounds in a 1-2 TeV window that the XLZD experiment will fully cover.
Chiral power counting of one- and two-body currents in direct detection of dark matter
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abstract
We present a common chiral power-counting scheme for vector, axial-vector, scalar, and pseudoscalar WIMP-nucleon interactions, and derive all one- and two-body currents up to third order in the chiral expansion. Matching our amplitudes to non-relativistic effective field theory, we find that chiral symmetry predicts a hierarchy amongst the non-relativistic operators. Moreover, we identify interaction channels where two-body currents that so far have not been accounted for become relevant.
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The third-generation-philic WIMP: an EFT analysis
A fermionic dark matter particle interacting mainly with third-generation fermions is allowed by current direct-detection bounds in a 1-2 TeV window that the XLZD experiment will fully cover.