CLAS physics database search results Measurement E216M161 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 1.5134 0.115097 0.17787229 27 1.46417 0.0453628 0.11496527 45 1.28266 0.0355651 0.10301158 63 1.27795 0.0272424 0.0961603 81 1.36527 0.0342776 0.1027164 99 1.28369 0.0434797 0.10800453 117 1.25259 0.0293003 0.18159467 135 1.1138 0.0472083 0.23785022 153 0.932329 0.0464236 0.41913806 171 1.48219 0.0117409 0.78277325