CLAS physics database search results Measurement E216M602 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 0.938517 0.063758 0.07982063 27 0.935839 0.0298111 0.07046299 45 0.813377 0.0208373 0.06324058 63 0.795704 0.0272437 0.06279827 81 0.818846 0.0291264 0.06065282 99 0.862208 0.0295321 0.06381415 117 0.789364 0.0314831 0.05994893 135 0.592649 0.0426998 0.06644771 153 0.452661 0.0273594 0.08396032 171 0.480133 0.00124983 0.2560644