CLAS physics database search results Measurement E216M1004 CLAS12 Run Group A Krishna Chandra 2018 psi(pi+) dsigma/dpsi_pip Stat. error Syst. error deg mcbn/rad mcbn/rad mcbn/rad 18 0.0510158 0.0074945 0.00841783 54 0.0533117 0.00623588 0.00741778 90 0.0708214 0.0107626 0.01400571 126 0.074258 0.00700089 0.0197456 162 0.119453 0.0136261 0.0113157 198 0.13762 0.0133215 0.01410658 234 0.0790066 0.00802954 0.01231235 270 0.0773291 0.00873515 0.00832289 306 0.056968 0.00618223 0.00825455 342 0.0502226 0.00426789 0.00716825