CLAS physics database search results Measurement E216M787 CLAS12 Run Group A Krishna Chandra 2018 psi(pi-) dsigma/dpsi_pim Stat. error Syst. error deg mcbn/rad mcbn/rad mcbn/rad 18 0.0576479 0.014306 0.01435803 54 0.0375723 0.00552413 0.00555123 90 0.0612482 0.00636014 0.00600141 126 0.0549924 0.00539887 0.00509545 162 0.0674467 0.00703469 0.00564753 198 0.0607794 0.00625068 0.00510869 234 0.0599336 0.00735514 0.00582697 270 0.0731934 0.00776691 0.00609106 306 0.0455182 0.00755793 0.00505817 342 0.0449256 0.0106905 0.01178264