CLAS physics database search results Measurement E216M481 CLAS12 Run Group A Krishna Chandra 2018 psi(pi-) dsigma/dpsi_pim Stat. error Syst. error deg mcbn/rad mcbn/rad mcbn/rad 18 0.29578 0.0115409 0.0333874 54 0.287476 0.0118436 0.02610502 90 0.326542 0.0101683 0.02489917 126 0.361659 0.0160913 0.02703576 162 0.427439 0.0107023 0.0312703 198 0.428799 0.010871 0.03386336 234 0.372807 0.0100464 0.02724386 270 0.340322 0.0125258 0.02830589 306 0.31752 0.0135596 0.02718579 342 0.28485 0.0114988 0.0347577