4.7 Article

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

期刊

PHYSICS LETTERS B
卷 746, 期 -, 页码 410-416

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ELSEVIER
DOI: 10.1016/j.physletb.2015.05.041

关键词

Dark matter; WIMPs; Chiral Lagrangians

资金

  1. BMBF ARCHES
  2. DFG [SFB 634]
  3. ERC Grant [307986 STRONGINT]

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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. (C) 2015 The Authors. Published by Elsevier B.V.

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