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arXiv · 1503.04811

Chiral power counting of one- and two-body currents in direct detection of dark matter

Martin Hoferichter·Philipp Klos·Achim Schwenk
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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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Martin Hoferichter, Philipp Klos, Achim Schwenk. 2015-03-16. Chiral power counting of one- and two-body currents in direct detection of dark matter. https://arxiv.org/abs/1503.04811

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