Precision Measurement of PArity Violation in Polarized Cold Neutron Capture on the Proton: the NPDGamma Experiment

摘要

The NPDGamma experiment at the Los Alamos Neutron Science Center (LANSCE) isdedicated to measure with high precision the parity violating asymmetry in the$\gamma$ emission after capture of spin polarized cold neutrons inpara-hydrogen. The measurement will determine unambiguously the weakpion-nucleon-nucleon ($\pi NN$) coupling constant {\it f$^1_{\pi}$}