CLAS physics database search results Measurement E216M715 CLAS12 Run Group A Krishna Chandra 2018 psi(pi-) dsigma/dpsi_pim Stat. error Syst. error deg mcbn/rad mcbn/rad mcbn/rad 18 0.153898 0.0262655 0.03269948 54 0.120827 0.00757899 0.01219431 90 0.142928 0.00648713 0.01064168 126 0.166869 0.00768913 0.01255684 162 0.175215 0.011415 0.01650738 198 0.196817 0.00701955 0.01489189 234 0.167719 0.00781611 0.013466 270 0.148226 0.00788687 0.01166375 306 0.129275 0.00785492 0.01261811 342 0.112726 0.00765149 0.01573211