CLAS physics database search results Measurement E216M320 CLAS12 Run Group A Krishna Chandra 2018 psi(pi+) dsigma/dpsi_pip Stat. error Syst. error deg mcbn/rad mcbn/rad mcbn/rad 18 0.501267 0.0143013 0.05187075 54 0.462392 0.0124017 0.04749324 90 0.494139 0.0131861 0.04636823 126 0.564274 0.016747 0.04919308 162 0.605363 0.0151473 0.05128427 198 0.608652 0.0160681 0.05168328 234 0.582181 0.013752 0.04960112 270 0.511438 0.0127936 0.04683787 306 0.484996 0.0210199 0.04836268 342 0.513573 0.0160994 0.05112613