CLAS physics database search results Measurement E216M617 CLAS12 Run Group A Krishna Chandra 2018 psi(pi+) dsigma/dpsi_pip Stat. error Syst. error deg mcbn/rad mcbn/rad mcbn/rad 18 0.184607 0.00609961 0.01813881 54 0.165969 0.00640164 0.01587837 90 0.202742 0.00754448 0.01568449 126 0.238744 0.00914576 0.01759332 162 0.339176 0.0115125 0.02601465 198 0.310247 0.0111314 0.02319462 234 0.232753 0.00859029 0.01816324 270 0.1941 0.00904499 0.01537543 306 0.158691 0.00690646 0.01401675 342 0.182146 0.0068579 0.01724843