CLAS physics database search results Measurement E216M751 CLAS12 Run Group A Krishna Chandra 2018 psi(pi-) dsigma/dpsi_pim Stat. error Syst. error deg mcbn/rad mcbn/rad mcbn/rad 18 0.0973881 0.00714356 0.01229645 54 0.0988705 0.00634765 0.0095017 90 0.121667 0.00796989 0.00996629 126 0.158545 0.00781289 0.01392825 162 0.200196 0.0084667 0.01470171 198 0.204317 0.00979882 0.01564051 234 0.161844 0.0082419 0.01182245 270 0.136188 0.00840588 0.01061915 306 0.117078 0.00780355 0.00989095 342 0.0909332 0.00638173 0.01010405