CLAS physics database search results Measurement E216M609 CLAS12 Run Group A Krishna Chandra 2018 psi(p) dsigma/dpsi_pr Stat. error Syst. error deg mcbn/rad mcbn/rad mcbn/rad 18 0.241395 0.0157679 0.02296129 54 0.245533 0.0110195 0.02039595 90 0.225751 0.00983021 0.01762402 126 0.246243 0.00824693 0.01823489 162 0.261445 0.00858476 0.02006335 198 0.246646 0.00849348 0.01847737 234 0.226784 0.0070607 0.01671436 270 0.232984 0.00964648 0.01866739 306 0.231819 0.00879681 0.02789851 342 0.196343 0.00958743 0.02081223