CLAS physics database search results Measurement E216M940 CLAS12 Run Group A Krishna Chandra 2018 psi(pi-) dsigma/dpsi_pim Stat. error Syst. error deg mcbn/rad mcbn/rad mcbn/rad 18 0.068615 0.00890886 0.02357217 54 0.0703739 0.00921718 0.00994251 90 0.0836107 0.0085285 0.00767163 126 0.088147 0.00791658 0.00713278 162 0.0889033 0.0113696 0.0074709 198 0.0984963 0.00900826 0.0090543 234 0.0733596 0.0119726 0.00808856 270 0.0921639 0.00933318 0.00977821 306 0.0881503 0.0122357 0.00986388 342 0.0587121 0.00688785 0.01121818