CLAS physics database search results Measurement E216M746 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 0.675613 0.0418967 0.05497178 27 0.586685 0.0240776 0.04952556 45 0.605506 0.0259577 0.04631428 63 0.474139 0.0152591 0.0374611 81 0.432126 0.0178878 0.03369984 99 0.4736 0.0206116 0.03647514 117 0.381662 0.0176456 0.02987219 135 0.277089 0.0159086 0.02679025 153 0.257997 0.017937 0.0456665 171 0.266274 0.00050812 0.13955998