CLAS physics database search results Measurement E216M656 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 0.366801 0.0539926 0.0345556 27 0.292003 0.0304602 0.02344285 45 0.30053 0.0257751 0.02615734 63 0.309373 0.0185751 0.02489142 81 0.252444 0.0153515 0.02140742 99 0.216925 0.024137 0.01720114 117 0.24277 0.0268515 0.02300621 135 0.355059 0.0676529 0.07847484 153 0.216269 0.0119664 0.10478973 171 0.308954 0.00026977 0.1658432