\!+ \!C_{uR,A}  \!- \ \!  
2C_{dR,A}  )
}{2\Lambda^2} \right] ^2 \! \! \! \lsim \frac{ 10^{-10 }}{4} {\rm GeV}^{-2}$$ where the experimental bound is for $m_\chi \sim 100$ GeV. For $\Lambda = $ TeV, this gives | (C\_[qL,A]{}+C\_[uR,A]{} - 2C\_[dR,A]{} )| 20    (SD). \[SD\] Comparing to eqn (\[lim3\]) shows that the contact interactions explored by SD direct detection experiments are mediated by physics which is not a contact interaction at the LHC, so are not excluded by the limits given in eqn (\[lim3\]). The limit (\[SD\]) is represented in figure \[fig2\] as the vertical exclusions.

Discussion
==========

From a bottom-up EFT point of view, it is important to include all operators which can interfere, when computing experimental constaints. This is to allow for cancellations. Including several operators which do not interfere improves the bound, but is not otherwise motivated. In this note, operators with vector and axial vector currents for the dark matter fermion $\chi$ were presented as an example, which illustrates two points.

First, the EFT at the LHC contains more particles than the light partons and dark matter that are relevant in direct detection. At the LHC, the Higgs and $Z$ should also be included. Matching the high 