CLAS physics database search results Measurement E216M520 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 0.701979 0.111656 0.10553156 27 0.484752 0.0455676 0.06658868 45 0.45391 0.0432642 0.06038557 63 0.460553 0.0580537 0.04125148 81 0.340259 0.0288916 0.03167195 99 0.366193 0.0269767 0.03155793 117 0.434215 0.0407103 0.03727145 135 0.386169 0.0246404 0.03452365 153 0.451196 0.0508676 0.03852335 171 0.449785 0.0512589 0.04893641