CLAS physics database search results Measurement E216M447 CLAS12 Run Group A Krishna Chandra 2018 psi(p) dsigma/dpsi_pr Stat. error Syst. error deg mcbn/rad mcbn/rad mcbn/rad 18 0.394784 0.0142436 0.06406474 54 0.391509 0.018098 0.03992122 90 0.384629 0.0238957 0.03584429 126 0.366329 0.00921915 0.02779406 162 0.380939 0.010067 0.02922028 198 0.353037 0.0103721 0.02725059 234 0.345273 0.0117159 0.02676643 270 0.358708 0.0104685 0.0282672 306 0.403854 0.0257926 0.04707664 342 0.373184 0.013562 0.06206054