CLAS physics database search results Measurement E216M995 CLAS12 Run Group A Krishna Chandra 2018 psi(pi+) dsigma/dpsi_pip Stat. error Syst. error deg mcbn/rad mcbn/rad mcbn/rad 18 0.0542624 0.00662851 0.00753459 54 0.054481 0.00595871 0.00673902 90 0.0646808 0.00580684 0.00686916 126 0.0885443 0.00734725 0.00806694 162 0.129721 0.0126724 0.01000566 198 0.0990729 0.0173452 0.00870963 234 0.082048 0.00767599 0.00788535 270 0.0625709 0.00721161 0.00604497 306 0.056615 0.00550658 0.00576239 342 0.0437617 0.00690004 0.00619918