Measurement of the Absolute np Scattering Differential Cross Section at   194 MeV
  We describe a double-scattering experiment with a novel tagged neutron beam to measure differential cross sections for np back-scattering to better than 2% absolute precision. The measurement focuses on angles and energies where the cross section magnitude and angle-dependence constrain the charged pion-nucleon coupling constant, but existing data show serious discrepancies among themselves and with energy-dependent partial wave analyses (PWA). The present results are in good accord with the PWA, but deviate systematically from other recent measurements. 
M. Sarsour, T. Peterson, M. Planinic, S.E. Vigdor, C. Allgower, B.   Bergenwall, J. Blomgren, T. Hossbach, W.W. Jacobs, C. J...