CLAS physics database search results Measurement E216M420 CLAS12 Run Group A Krishna Chandra 2018 psi(p) dsigma/dpsi_pr Stat. error Syst. error deg mcbn/rad mcbn/rad mcbn/rad 18 0.2943 0.0220266 0.04373373 54 0.263755 0.0108931 0.02549139 90 0.221851 0.00909689 0.01905272 126 0.20856 0.00799794 0.01716822 162 0.236459 0.0096745 0.01887144 198 0.235707 0.0124142 0.02086989 234 0.208519 0.00975215 0.01806333 270 0.194713 0.00868077 0.01686507 306 0.294036 0.0174408 0.02853986 342 0.253867 0.0153194 0.0478442