CLAS physics database search results Measurement E216M467 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 1.37189 0.0557446 0.1343494 27 1.23541 0.029573 0.10999203 45 1.18507 0.0273556 0.10078893 63 1.20436 0.0398389 0.09980809 81 1.34419 0.0363897 0.10596395 99 1.40992 0.0383194 0.10547335 117 1.14991 0.0776006 0.09898439 135 1.14206 0.159729 0.17609393 153 0.736952 0.0469396 0.16692701 171 0.785441 0.0021224 0.45398456