CLAS physics database search results Measurement E151M1921 EG4 Xiaochao Zheng 2016 cos(theta_pi+) phi(pi+) A_LL Stat. error Syst. error degrees 0.35 78 -0.5078 0.7429 0.043 0.35 270 -0.2505 0.5696 0.0336 0.45 138 -0.2387 0.7327 0.0333 0.45 222 -1.434 0.6632 0.0919 0.45 270 -0.7522 0.6162 0.0546 0.45 282 -0.9298 0.6675 0.0638 0.55 114 -0.8719 0.7203 0.0608 0.55 126 0.496 0.7426 0.0425 0.55 138 -0.7442 0.8363 0.0542 0.55 210 0.0523 0.6935 0.0302 0.55 222 -0.721 0.6736 0.053 0.55 246 0.0781 0.7334 0.0304 0.55 258 0.0639 0.6488 0.0302 0.55 270 0.0439 0.6055 0.0301 0.65 126 -0.5362 0.6517 0.0442 0.65 138 -0.646 0.6135 0.0493 0.65 210 -0.1294 0.7244 0.031 0.65 222 -1.2382 0.5853 0.0808 0.65 234 -0.3963 0.7009 0.0384 0.65 294 0.4834 0.652 0.0419 0.75 54 -0.2483 0.7414 0.0336 0.75 66 -0.3672 0.6334 0.0374 0.75 114 -0.0704 0.6509 0.0303 0.75 198 0.5717 0.6791 0.0458 0.75 210 -0.3825 0.6128 0.0379 0.75 222 -0.2237 0.5602 0.0329 0.75 234 -0.5383 0.6743 0.0443 0.75 270 -0.2971 0.5611 0.035 0.75 282 -0.5992 0.4993 0.0471 0.85 114 -0.3905 0.5901 0.0382 0.85 126 -0.2955 0.5931 0.0349 0.85 138 0.8945 0.6651 0.0619 0.85 198 -0.7393 0.5841 0.0539 0.85 210 -0.1194 0.582 0.0309 0.85 222 -0.2078 0.5207 0.0325 0.85 234 -0.8572 0.607 0.06 0.85 270 -0.339 0.6888 0.0364