CLAS physics database search results Measurement E216M716 CLAS12 Run Group A Krishna Chandra 2018 psi(pi+) dsigma/dpsi_pip Stat. error Syst. error deg mcbn/rad mcbn/rad mcbn/rad 18 0.129934 0.00847474 0.01311831 54 0.119974 0.00621988 0.01032981 90 0.132254 0.00636765 0.01095161 126 0.181523 0.00879295 0.01465875 162 0.232712 0.0113431 0.01833304 198 0.194553 0.0127549 0.01564897 234 0.19406 0.00959487 0.01462491 270 0.146256 0.00681856 0.0120862 306 0.128565 0.00581771 0.01150743 342 0.126784 0.00606778 0.0110479