CLAS physics database search results Measurement E216M824 CLAS12 Run Group A Krishna Chandra 2018 psi(pi+) dsigma/dpsi_pip Stat. error Syst. error deg mcbn/rad mcbn/rad mcbn/rad 18 0.0832118 0.00534639 0.00846917 54 0.081409 0.00512862 0.00862386 90 0.127791 0.01561 0.01569666 126 0.138061 0.0123892 0.01383153 162 0.115304 0.0076204 0.01103982 198 0.113875 0.00799045 0.01090297 234 0.116284 0.00827103 0.01008497 270 0.0823518 0.00712408 0.0086139 306 0.0777198 0.00503676 0.00866884 342 0.0840183 0.00527901 0.00852333