CLAS physics database search results Measurement E216M922 CLAS12 Run Group A Krishna Chandra 2018 psi(pi-) dsigma/dpsi_pim Stat. error Syst. error deg mcbn/rad mcbn/rad mcbn/rad 18 0.014556 0.0136917 0.00779403 54 0.037309 0.00719638 0.00422224 90 0.0338591 0.00490451 0.0036405 126 0.0452227 0.00608758 0.00412275 162 0.051237 0.00982551 0.00507291 198 0.0562153 0.0072376 0.00580937 234 0.0520075 0.00616215 0.00461069 270 0.0334561 0.0050774 0.00281202 306 0.0320925 0.005559 0.00409746 342 0.0323448 0.0130585 0.00694299