CLAS physics database search results Measurement E216M383 CLAS12 Run Group A Krishna Chandra 2018 psi(pi+) dsigma/dpsi_pip Stat. error Syst. error deg mcbn/rad mcbn/rad mcbn/rad 18 0.139108 0.0108066 0.01997248 54 0.123116 0.00857046 0.0185549 90 0.136701 0.0082536 0.02015667 126 0.129863 0.0149647 0.02173243 162 0.171112 0.0185309 0.03096807 198 0.157149 0.0161648 0.02748065 234 0.133385 0.00824421 0.02234374 270 0.123395 0.00986792 0.01924001 306 0.127629 0.0104685 0.01913392 342 0.107774 0.00712957 0.01952679