CLAS physics database search results Measurement E151M1602 EG4 Xiaochao Zheng 2016 cos(theta_pi+) phi(pi+) A_LL Stat. error Syst. error degrees 0.55 138 -0.7551 0.8381 0.0543 0.55 222 -0.2612 0.7335 0.0339 0.55 234 1.0674 0.9307 0.0707 0.55 246 -0.4158 0.61 0.0388 0.55 258 0.1059 0.7076 0.0511 0.65 126 0.9706 0.5878 0.0654 0.65 138 0.8875 0.6153 0.0608 0.65 150 -1.3984 0.7469 0.089 0.65 222 -0.2617 0.6954 0.062 0.65 234 -0.5423 0.6483 0.0439 0.65 246 -0.1607 0.5364 0.0327 0.65 258 0.3308 0.559 0.0382 0.75 126 -0.9957 0.6291 0.067 0.75 138 0.1232 0.6315 0.0407 0.75 150 -0.2973 0.835 0.0349 0.75 210 1.2939 0.9112 0.081 0.75 222 0.8134 1.1923 0.056 0.75 234 -0.6033 0.6641 0.0483 0.75 246 -0.0604 0.5474 0.0405 0.75 258 0.5364 0.4741 0.0452 0.85 126 1.5118 0.9844 0.0929 0.85 150 -0.0691 0.771 0.0303 0.85 234 -0.3894 0.5882 0.0409 0.85 246 0.5629 0.4692 0.0468 0.85 258 0.3964 0.5452 0.0497 0.85 270 1.0971 0.4989 0.0715 0.95 102 -0.2672 0.7819 0.034 0.95 114 0.5703 0.5634 0.046 0.95 246 -0.3616 0.566 0.0405 0.95 258 0.1725 0.6262 0.0317 0.95 270 1.2065 0.7475 0.0763