CLAS physics database search results Measurement E216M329 CLAS12 Run Group A Krishna Chandra 2018 psi(pi+) dsigma/dpsi_pip Stat. error Syst. error deg mcbn/rad mcbn/rad mcbn/rad 18 0.509548 0.0131185 0.0519069 54 0.455006 0.0119657 0.04539185 90 0.477881 0.0120502 0.04408568 126 0.557548 0.0128498 0.04640916 162 0.637476 0.0232167 0.05206574 198 0.624209 0.024281 0.05048071 234 0.58474 0.0198055 0.05164378 270 0.468963 0.0335107 0.04989226 306 0.436067 0.0192639 0.04564375 342 0.488449 0.012478 0.05173855