CLAS physics database search results Measurement E216M755 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 0.792524 0.0534886 0.06204598 27 0.678505 0.0298219 0.04917107 45 0.527095 0.0210959 0.0393767 63 0.483108 0.0182189 0.03658521 81 0.430784 0.0177599 0.0357943 99 0.432881 0.0213932 0.03169888 117 0.376488 0.0159423 0.03168949 135 0.294206 0.0220139 0.02901852 153 0.249642 0.0193749 0.04319477 171 0.24059 0.00056288 0.1267094