CLAS physics database search results Measurement E216M743 CLAS12 Run Group A Krishna Chandra 2018 psi(pi+) dsigma/dpsi_pip Stat. error Syst. error deg mcbn/rad mcbn/rad mcbn/rad 18 0.108541 0.00587057 0.0102573 54 0.098913 0.00498636 0.00937595 90 0.129923 0.00613329 0.01010034 126 0.165661 0.00830742 0.01255786 162 0.213147 0.0083821 0.01686063 198 0.184512 0.00802146 0.01495713 234 0.17369 0.00962113 0.01404379 270 0.11344 0.00468316 0.00918832 306 0.105187 0.00483609 0.00895532 342 0.108715 0.00483911 0.0104871