CLAS physics database search results Measurement E216M797 CLAS12 Run Group A Krishna Chandra 2018 psi(pi+) dsigma/dpsi_pip Stat. error Syst. error deg mcbn/rad mcbn/rad mcbn/rad 18 0.0397912 0.00365441 0.00477294 54 0.0441605 0.00414062 0.00494117 90 0.0608514 0.00564359 0.00643198 126 0.0792202 0.00677531 0.00801283 162 0.0931542 0.0101684 0.016446 198 0.0976722 0.00954119 0.01062041 234 0.073754 0.00677529 0.00841225 270 0.054699 0.00525537 0.00565947 306 0.0450225 0.00444115 0.00524064 342 0.0357897 0.00330865 0.00451375