CLAS physics database search results Measurement E216M842 CLAS12 Run Group A Krishna Chandra 2018 psi(pi+) dsigma/dpsi_pip Stat. error Syst. error deg mcbn/rad mcbn/rad mcbn/rad 18 0.076161 0.00492569 0.0075762 54 0.0875388 0.00617335 0.00799198 90 0.0883842 0.0060378 0.00907542 126 0.121987 0.0110038 0.00983121 162 0.145082 0.0102167 0.01178017 198 0.129403 0.0122918 0.01232203 234 0.112999 0.00792724 0.00892655 270 0.0933563 0.00838976 0.00924001 306 0.0681855 0.00563096 0.00766908 342 0.0713324 0.0053846 0.00762927