CLAS physics database search results Measurement E216M266 CLAS12 Run Group A Krishna Chandra 2018 psi(pi+) dsigma/dpsi_pip Stat. error Syst. error deg mcbn/rad mcbn/rad mcbn/rad 18 0.232046 0.0125994 0.03073981 54 0.222028 0.0124988 0.03168432 90 0.217412 0.00968869 0.03199435 126 0.253493 0.0132246 0.03667449 162 0.298522 0.0112351 0.04285852 198 0.34381 0.0140372 0.04435746 234 0.322842 0.0411815 0.04313995 270 0.244176 0.0124127 0.03435379 306 0.190036 0.00873712 0.02912196 342 0.23372 0.0189551 0.03469812