CLAS physics database search results Measurement E216M770 CLAS12 Run Group A Krishna Chandra 2018 psi(pi+) dsigma/dpsi_pip Stat. error Syst. error deg mcbn/rad mcbn/rad mcbn/rad 18 0.0491746 0.0126416 0.00566083 54 0.0392731 0.00478966 0.00448561 90 0.053513 0.0068258 0.00610733 126 0.0548642 0.00676505 0.00651267 162 0.0743519 0.00940095 0.00817218 198 0.0589861 0.00774405 0.0072804 234 0.0570732 0.00653279 0.00641123 270 0.0442305 0.0054283 0.00518798 306 0.043101 0.0103467 0.00771207 342 0.0320269 0.00414553 0.00440652