CLAS physics database search results Measurement E213M590 E1-6, 2025 R.W. Gothe, A. Trivedi 2001 theta(pi+) dsigma/d(−cos(theta_pip)) Stat. error Syst. error Total error deg mcb/rad mcb/rad mcb/rad mcb/rad 9 2.6991 0.2016 0.3369 0.4727 27 2.9518 0.1381 0.3497 0.5005 45 2.4462 0.1509 0.3217 0.4544 63 2.3438 0.1057 0.299 0.3171 81 2.4549 0.1252 0.318 0.3418 99 2.5855 0.0836 0.3198 0.3306 117 2.4934 0.0968 0.3151 0.3296 135 1.7776 0.0924 0.3011 0.4267 153 1.397 0.0769 0.5815 0.8262 171 2.1742 0.0038 1.2945 1.8302