CLAS physics database search results Measurement E216M536 CLAS12 Run Group A Krishna Chandra 2018 psi(pi+) dsigma/dpsi_pip Stat. error Syst. error deg mcbn/rad mcbn/rad mcbn/rad 18 0.0918327 0.00576944 0.00990087 54 0.105146 0.0064263 0.01085256 90 0.123444 0.0071131 0.01258382 126 0.156666 0.00832687 0.01789424 162 0.189517 0.00923026 0.0196378 198 0.193176 0.00892659 0.01922312 234 0.17304 0.0161104 0.01950405 270 0.113091 0.00676007 0.01198045 306 0.112262 0.00718359 0.01195203 342 0.0858088 0.00516209 0.00997403