CLAS physics database search results Measurement E216M302 CLAS12 Run Group A Krishna Chandra 2018 psi(pi+) dsigma/dpsi_pip Stat. error Syst. error deg mcbn/rad mcbn/rad mcbn/rad 18 0.384727 0.0138413 0.09406443 54 0.406192 0.0149618 0.04531743 90 0.408518 0.0117191 0.04479181 126 0.514309 0.0145671 0.04954802 162 0.611977 0.0144324 0.05843742 198 0.587994 0.02065 0.06135629 234 0.491007 0.0122629 0.04829251 270 0.413525 0.0183909 0.04392945 306 0.375646 0.0115625 0.04268414 342 0.377962 0.0128946 0.08792739