CLAS physics database search results Measurement E151M1627 EG4 Xiaochao Zheng 2016 cos(theta_pi+) phi(pi+) A_LL Stat. error Syst. error degrees 0.45 30 -0.4411 1.0893 0.0395 0.45 42 0.6437 0.7699 0.0487 0.45 222 -1.1194 0.6747 0.0745 0.55 138 -0.2255 0.887 0.0329 0.55 150 -1.3832 0.8518 0.0882 0.55 210 0.4635 0.8998 0.0409 0.55 222 -1.3277 0.7888 0.085 0.55 234 0.1826 0.7787 0.0319 0.65 138 -0.8254 0.8683 0.0579 0.65 150 1.486 0.8117 0.094 0.65 210 -0.9129 0.7567 0.0624 0.65 222 0.388 0.798 0.038 0.75 222 -0.7707 0.7673 0.0551 0.75 234 -0.3782 0.7343 0.0376 0.85 126 1.1504 0.9589 0.0752 0.85 138 0.3606 0.8637 0.037 0.85 222 -1.3757 0.8009 0.0877 0.85 234 0.6008 0.7426 0.0469 0.45 234 -1.2665 0.9884 0.0795 0.55 138 0.7304 1.2067 0.052 0.55 210 -2.1768 0.7121 0.1301 0.55 222 -0.2674 1.288 0.0338 0.55 234 -1.2322 0.7788 0.0777 0.65 138 2.9271 2.9271 0.1728 0.65 222 2.204 0.6722 0.1316 0.65 234 -1.1433 0.9675 0.0729 0.75 210 -0.3152 1.1493 0.0352 0.75 222 -1.6037 0.663 0.098 0.75 234 0.4613 1.0441 0.0402 0.85 222 -1.1707 1.0229 0.0744 0.85 234 0.3257 1.1366 0.0355