CLAS physics database search results Measurement E216M149 CLAS12 Run Group A Krishna Chandra 2018 psi(pi+) dsigma/dpsi_pip Stat. error Syst. error deg mcbn/rad mcbn/rad mcbn/rad 18 0.314133 0.0127496 0.04587527 54 0.336648 0.0341493 0.05040737 90 0.362854 0.0104814 0.0509046 126 0.455895 0.011976 0.05918701 162 0.557031 0.0133708 0.07103088 198 0.56196 0.0198513 0.07063644 234 0.44285 0.0120582 0.05839847 270 0.351737 0.0361868 0.06367663 306 0.302315 0.0119263 0.04620845 342 0.329743 0.0105682 0.04753343