CLAS physics database search results Measurement E216M490 CLAS12 Run Group A Krishna Chandra 2018 psi(pi-) dsigma/dpsi_pim Stat. error Syst. error deg mcbn/rad mcbn/rad mcbn/rad 18 0.255855 0.0116384 0.03039622 54 0.286376 0.0105245 0.02542275 90 0.298951 0.0124382 0.02380148 126 0.373183 0.0105123 0.02723584 162 0.443089 0.00988179 0.0316448 198 0.428655 0.0116713 0.03104191 234 0.370269 0.0111297 0.02719129 270 0.303152 0.0137235 0.02394948 306 0.281867 0.012736 0.02494128 342 0.265368 0.0101491 0.03238027