CLAS physics database search results Measurement E213M311 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 3.4909 0.2415 0.4366 0.6139 27 3.0092 0.1476 0.3802 0.5429 45 3.3254 0.2326 0.453 0.6404 63 3.237 0.133 0.4132 0.434 81 3.132 0.1315 0.411 0.4315 99 3.4231 0.1317 0.4316 0.4513 117 3.3449 0.1455 0.443 0.6283 135 2.499 0.1681 0.4634 0.6587 153 2.0229 0.1349 0.8128 1.1509 171 2.8162 0.0036 1.6763 2.3688