CLAS physics database search results Measurement E216M538 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 0.689496 0.0684837 0.07912679 27 0.652667 0.0463705 0.08493056 45 0.554165 0.0312671 0.04955249 63 0.470953 0.0289076 0.04357316 81 0.417584 0.0252996 0.03434584 99 0.345139 0.0241785 0.05792254 117 0.380095 0.0249386 0.03643586 135 0.386917 0.0423573 0.0460026 153 0.364855 0.0249336 0.05157727 171 0.420004 0.0498842 0.06681151