CLAS physics database search results Measurement E216M646 CLAS12 Run Group A Krishna Chandra 2018 theta(pi-) dsigma/d(−cos(theta_pim)) Stat. error Syst. error deg mcbn/rad mcbn/rad mcbn/rad 9 0.273066 0.0436593 0.08233217 27 0.341251 0.0470313 0.03630448 45 0.27285 0.038194 0.02733622 63 0.212 0.0225261 0.02527104 81 0.215294 0.0203796 0.01856417 99 0.245314 0.0314834 0.0239919 117 0.251664 0.0321307 0.05413149 135 0.169038 0.0266125 0.01683385 153 0.235142 0.0266484 0.0210199 171 0.358512 0.0701433 0.05313556