CLAS physics database search results Measurement E216M680 CLAS12 Run Group A Krishna Chandra 2018 psi(pi+) dsigma/dpsi_pip Stat. error Syst. error deg mcbn/rad mcbn/rad mcbn/rad 18 0.11145 0.00744324 0.01090364 54 0.112798 0.00645126 0.01060432 90 0.132561 0.00954453 0.01392831 126 0.15691 0.00811021 0.01441577 162 0.184124 0.00973655 0.01714132 198 0.166968 0.00948371 0.01743427 234 0.166155 0.0097331 0.01436381 270 0.142714 0.0119364 0.01267163 306 0.112364 0.00606752 0.01170505 342 0.113839 0.00786489 0.0112752