CLAS physics database search results Measurement E213M509 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 2.8484 0.1699 0.4374 0.642 27 2.6578 0.1069 0.3805 0.3953 45 2.1888 0.1122 0.3369 0.3551 63 1.8905 0.1031 0.2902 0.308 81 1.9725 0.0899 0.2962 0.3095 99 2.1474 0.0933 0.3169 0.3303 117 2.2732 0.0852 0.3358 0.3465 135 1.9698 0.1049 0.3641 0.5445 153 1.7906 0.1028 0.891 1.2684 171 2.3919 0.0037 1.4929 2.1189