CLAS physics database search results Measurement E216M652 CLAS12 Run Group A Krishna Chandra 2018 psi(pi-) dsigma/dpsi_pim Stat. error Syst. error deg mcbn/rad mcbn/rad mcbn/rad 18 0.0918145 0.0390182 0.03326725 54 0.084649 0.0102705 0.0097981 90 0.100598 0.00910655 0.00868278 126 0.0855114 0.00626553 0.00690826 162 0.0996371 0.00894934 0.00911603 198 0.0944587 0.00878556 0.00756559 234 0.104279 0.00880293 0.00916328 270 0.0853443 0.00936274 0.02614813 306 0.0842102 0.0109455 0.0093549 342 0.0706357 0.0114998 0.01255257