CLAS physics database search results Measurement E216M619 CLAS12 Run Group A Krishna Chandra 2018 theta(pi-) dsigma/d(−cos(theta_pim)) Stat. error Syst. error deg mcbn/rad mcbn/rad mcbn/rad 9 1.29199 0.0771843 0.14691537 27 1.02096 0.0421883 0.09023751 45 0.834035 0.0366499 0.06287961 63 0.736899 0.0256506 0.05483119 81 0.709737 0.0320093 0.05262696 99 0.610131 0.0194717 0.04806856 117 0.516434 0.018761 0.04320147 135 0.515997 0.028076 0.05006892 153 0.510959 0.0489603 0.05620578 171 0.694029 0.0488233 0.0914912