CLAS physics database search results Measurement E216M625 CLAS12 Run Group A Krishna Chandra 2018 psi(pi-) dsigma/dpsi_pim Stat. error Syst. error deg mcbn/rad mcbn/rad mcbn/rad 18 0.16714 0.0135351 0.0231792 54 0.163844 0.00968059 0.01524056 90 0.185719 0.00727219 0.01487149 126 0.250111 0.00924397 0.01888269 162 0.287771 0.0109347 0.02160026 198 0.297032 0.00870865 0.02178278 234 0.242763 0.010773 0.01847309 270 0.216972 0.0115574 0.02137289 306 0.165064 0.00823255 0.014508 342 0.152051 0.00837874 0.01618753