Precision Measurement of PArity Violation in Polarized Cold Neutron   Capture on the Proton: the NPDGamma Experiment
  The NPDGamma experiment at the Los Alamos Neutron Science Center (LANSCE) is dedicated to measure with high precision the parity violating asymmetry in the $\gamma$ emission after capture of spin polarized cold neutrons in para-hydrogen. The measurement will determine unambiguously the weak pion-nucleon-nucleon ($\pi NN$) coupling constant {\it f$^1_{\pi}$} 
Lauss Bernhard (for the NPDGamma Collaboration)