CLAS physics database search results Measurement E216M599 CLAS12 Run Group A Krishna Chandra 2018 psi(pi+) dsigma/dpsi_pip Stat. error Syst. error deg mcbn/rad mcbn/rad mcbn/rad 18 0.212226 0.0133146 0.02013677 54 0.183643 0.00802446 0.01769449 90 0.218713 0.0102713 0.01712659 126 0.292086 0.00992247 0.02312171 162 0.323861 0.01079 0.02551005 198 0.333286 0.0161955 0.02679411 234 0.291148 0.0100716 0.02197398 270 0.202053 0.0102029 0.01687214 306 0.196195 0.00816994 0.01706492 342 0.188033 0.00687741 0.01792441