CLAS physics database search results Measurement E216M185 CLAS12 Run Group A Krishna Chandra 2018 psi(pi+) dsigma/dpsi_pip Stat. error Syst. error deg mcbn/rad mcbn/rad mcbn/rad 18 0.749312 0.0166824 0.09213319 54 0.738497 0.0192591 0.08677299 90 0.794436 0.0162045 0.0837028 126 0.910007 0.0604425 0.09290306 162 0.973886 0.0201322 0.09551413 198 0.977846 0.0244359 0.09833818 234 0.862941 0.0187702 0.08537369 270 0.74893 0.0137704 0.08128887 306 0.705659 0.0157919 0.08738439 342 0.731901 0.014401 0.09397121