CLAS physics database search results Measurement E216M167 CLAS12 Run Group A Krishna Chandra 2018 psi(pi+) dsigma/dpsi_pip Stat. error Syst. error deg mcbn/rad mcbn/rad mcbn/rad 18 0.352682 0.0194772 0.04456829 54 0.367976 0.0124754 0.04291211 90 0.411843 0.0160328 0.04270004 126 0.574257 0.0159649 0.05248034 162 0.642284 0.0144685 0.06277924 198 0.667597 0.0167558 0.06361244 234 0.532803 0.0119638 0.05104366 270 0.40323 0.0106086 0.04182413 306 0.361211 0.0107902 0.04106656 342 0.398918 0.0166662 0.04396891