CLAS physics database search results Measurement E216M923 CLAS12 Run Group A Krishna Chandra 2018 psi(pi+) dsigma/dpsi_pip Stat. error Syst. error deg mcbn/rad mcbn/rad mcbn/rad 18 0.029107 0.00379967 0.00360186 54 0.0357904 0.00894704 0.00578932 90 0.031566 0.00472517 0.00348444 126 0.0458023 0.00615062 0.00460261 162 0.0651065 0.011352 0.00970446 198 0.0702645 0.022036 0.01173964 234 0.0393935 0.00551289 0.00396841 270 0.0363997 0.00528991 0.00407684 306 0.0279201 0.00397932 0.00317306 342 0.0165069 0.00700352 0.00340672