CLAS physics database search results Measurement E216M422 CLAS12 Run Group A Krishna Chandra 2018 theta(pi+) dsigma/d(−cos(theta_pip)) Stat. error Syst. error deg mcbn/rad mcbn/rad mcbn/rad 9 0.831158 0.0603144 0.07960106 27 0.740108 0.0418416 0.06594514 45 0.714879 0.0238664 0.05687225 63 0.711211 0.0240904 0.05488225 81 0.753126 0.0225888 0.05849904 99 0.765507 0.028238 0.05718498 117 0.782343 0.0288469 0.08488266 135 0.743184 0.0461721 0.15698496 153 0.550029 0.0222116 0.24069566 171 0.807779 0.00232421 0.43429216