CLAS physics database search results Measurement E216M608 CLAS12 Run Group A Krishna Chandra 2018 psi(pi+) dsigma/dpsi_pip Stat. error Syst. error deg mcbn/rad mcbn/rad mcbn/rad 18 0.196542 0.00692859 0.01962109 54 0.182523 0.00675119 0.01545047 90 0.208714 0.015863 0.01706238 126 0.260039 0.00877759 0.01995713 162 0.351612 0.0135111 0.04066294 198 0.319477 0.0141854 0.02435574 234 0.263155 0.0115622 0.03352364 270 0.207584 0.00770747 0.01629763 306 0.185056 0.0072335 0.01566285 342 0.1939 0.00747661 0.01848701