CLAS physics database search results Measurement E216M841 CLAS12 Run Group A Krishna Chandra 2018 psi(pi-) dsigma/dpsi_pim Stat. error Syst. error deg mcbn/rad mcbn/rad mcbn/rad 18 0.0671724 0.00693995 0.0111911 54 0.0705504 0.00622504 0.00712815 90 0.0950483 0.00934112 0.00771425 126 0.101665 0.00605371 0.00892155 162 0.11694 0.00676539 0.00932459 198 0.134096 0.00715828 0.01168505 234 0.109554 0.00754883 0.00998277 270 0.0953346 0.00741301 0.0087344 306 0.0711115 0.00512412 0.00746325 342 0.0817316 0.00772469 0.01040046