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Chiral power counting of one- and two-body currents in direct detection of dark matter
oleh: Martin Hoferichter, Philipp Klos, Achim Schwenk
| Format: | Article |
|---|---|
| Diterbitkan: | Elsevier 2015-06-01 |
Deskripsi
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 previously have not been accounted for become relevant. Keywords: Dark matter, WIMPs, Chiral Lagrangians