CLAS physics database search results Measurement E216M800 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 0.222951 0.043302 0.04018011 27 0.20804 0.0208752 0.01955914 45 0.197142 0.0151415 0.01692926 63 0.204048 0.0141019 0.01944486 81 0.24318 0.016352 0.02192368 99 0.175807 0.0153895 0.01505034 117 0.199349 0.0182731 0.01927505 135 0.182226 0.0288732 0.03357515 153 0.111332 0.00998355 0.07925379 171 0.169561 0.00015264 0.09184684