CLAS physics database search results Measurement E216M896 CLAS12 Run Group A Krishna Chandra 2018 psi(pi+) dsigma/dpsi_pip Stat. error Syst. error deg mcbn/rad mcbn/rad mcbn/rad 18 0.0170562 0.00362989 0.00281878 54 0.0300446 0.0051384 0.00409733 90 0.0357962 0.00698225 0.00528307 126 0.039733 0.00654596 0.00514332 162 0.0369527 0.00727332 0.0058171 198 0.0490705 0.00830925 0.00585541 234 0.0320227 0.00653564 0.00536983 270 0.0321452 0.00597851 0.00387125 306 0.0262339 0.00511815 0.00437314 342 0.0215576 0.00443859 0.00333402