CLAS physics database search results Measurement E216M986 CLAS12 Run Group A Krishna Chandra 2018 psi(pi+) dsigma/dpsi_pip Stat. error Syst. error deg mcbn/rad mcbn/rad mcbn/rad 18 0.0551135 0.00538311 0.00853894 54 0.0594778 0.00507108 0.00622953 90 0.0645772 0.00956685 0.00814061 126 0.0898222 0.0102878 0.00833915 162 0.100273 0.0122544 0.00855724 198 0.0669633 0.0104156 0.01050874 234 0.0820627 0.0101575 0.00870511 270 0.077142 0.0109042 0.00983025 306 0.0455957 0.00798631 0.00588436 342 0.0579958 0.00623398 0.00765313