CLAS physics database search results Measurement E216M779 CLAS12 Run Group A Krishna Chandra 2018 psi(pi+) dsigma/dpsi_pip Stat. error Syst. error deg mcbn/rad mcbn/rad mcbn/rad 18 0.0354138 0.00410661 0.00436384 54 0.034769 0.00394022 0.00471928 90 0.0484491 0.00547625 0.00572764 126 0.0659164 0.00870522 0.00734302 162 0.0691858 0.00740349 0.0083177 198 0.0681235 0.00813001 0.00742195 234 0.0771807 0.0114186 0.00753861 270 0.0476421 0.00684498 0.00645803 306 0.0498277 0.00536474 0.00566468 342 0.0345924 0.00553824 0.00429044