Constraining Anomalous Forces with Pseudoscalar and Axial Couplings   Employing a Spin-Independent Analysis
  Present laboratory limits on the coupling strength of anomalous pseudoscalar and axial interactions are many orders of magnitude weaker than their scalar and vector analogs. Here we investigate two mechanisms which can circumvent this suppression and thereby lead to improved limits. 
S. Aldaihan, W.M. Snow, D.E. Krause, J.C. Long, and E. Fischbach
hep-ph nucl-th