CLAS physics database search results Measurement E151M1778 EG4 Xiaochao Zheng 2016 cos(theta_pi+) phi(pi+) A_LL Stat. error Syst. error degrees 0.25 66 0.5675 0.7908 0.0456 0.35 66 0.0317 0.7762 0.0301 0.35 78 -0.3943 0.8128 0.0384 0.65 90 -0.394 0.7384 0.0383 0.65 102 -0.2546 0.5756 0.0337 0.65 114 1.2287 0.7382 0.0803 0.65 258 -0.1853 0.7703 0.032 0.65 270 -0.5757 0.7383 0.046 0.75 90 1.7711 0.5959 0.1114 0.75 102 0.6774 0.5858 0.0508 0.75 114 -0.5166 0.6168 0.0434 0.75 126 0.9736 0.6425 0.0662 0.75 234 1.5302 0.6065 0.0975 0.75 246 0.0049 0.6254 0.03 0.75 258 0.3975 0.6034 0.0385 0.75 270 1.2308 0.558 0.0804 0.75 282 0.8528 0.7353 0.0598 0.85 90 -0.5438 0.7116 0.0446 0.85 102 0.3098 0.5835 0.0354 0.85 114 0.823 0.646 0.0582 0.85 126 -0.0095 0.693 0.03 0.85 138 1.2082 0.824 0.0791 0.85 222 0.1696 0.7301 0.0317 0.85 234 0.6187 0.7446 0.048 0.85 246 0.9756 0.5567 0.0663 0.85 258 -0.7893 0.5664 0.0565 0.85 270 -0.1545 0.57 0.0314 0.85 282 -0.9353 0.5692 0.0641 0.95 66 0.7038 0.7241 0.0521 0.95 102 0.2605 0.6785 0.0339 0.95 126 -0.1127 0.7196 0.0308 0.95 138 -0.3549 0.6946 0.0369 0.95 222 0.8798 0.6278 0.0612 0.95 234 1.1589 0.6493 0.0764 0.95 246 0.9723 0.5307 0.0661 0.95 258 0.8433 0.4718 0.0593 0.95 270 0.3033 0.4815 0.0352 0.95 282 0.4194 0.5121 0.0393 0.95 294 -0.0862 0.629 0.0305