CLAS physics database search results Measurement E216M890 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 0.20648 0.085187 0.06441993 27 0.0807465 0.0249534 0.01057831 45 0.0668362 0.0152389 0.01108673 63 0.0597509 0.0128219 0.01701982 81 0.0620936 0.0140688 0.00662847 99 0.0720663 0.0148043 0.00837653 117 0.0484139 0.0264869 0.00932651 135 0.0329725 0.00593266 0.01969842 153 0.0350483 0.00011787 0.02811371 171 0.0450953 3.798e-05 0.03544099