CLAS physics database search results Measurement E216M175 CLAS12 Run Group A Krishna Chandra 2018 psi(pi-) dsigma/dpsi_pim Stat. error Syst. error deg mcbn/rad mcbn/rad mcbn/rad 18 0.62205 0.044667 0.09077223 54 0.665168 0.0312287 0.07070412 90 0.670944 0.0166092 0.05517241 126 0.719247 0.0206575 0.05426012 162 0.727534 0.015126 0.05532335 198 0.708736 0.0146698 0.05504458 234 0.712244 0.0155676 0.05225802 270 0.681447 0.0271739 0.05627417 306 0.736927 0.0930558 0.11454298 342 0.725046 0.0938731 0.11269906