CLAS physics database search results Measurement E151M1749 EG4 Xiaochao Zheng 2016 cos(theta_pi+) phi(pi+) A_LL Stat. error Syst. error degrees 0.55 270 -0.7735 0.7097 0.0557 0.65 90 -0.2275 0.6722 0.033 0.65 102 0.3161 0.6778 0.0356 0.65 258 -0.4092 0.6641 0.0389 0.65 270 0.5535 0.7327 0.045 0.65 282 0.8599 0.693 0.0601 0.65 294 1.3629 0.5759 0.0879 0.75 78 -0.3707 0.602 0.0375 0.75 90 -0.6036 0.6119 0.0473 0.75 102 0.9063 0.6107 0.0626 0.75 114 0.729 0.6138 0.0534 0.75 246 0.3866 0.6418 0.0381 0.75 258 -0.1336 0.4985 0.0311 0.75 270 -0.6755 0.5278 0.0507 0.75 282 0.3177 0.7352 0.0356 0.85 90 0.2838 0.4994 0.0346 0.85 102 0.2761 0.5142 0.0343 0.85 114 -0.0491 0.6392 0.0301 0.85 126 -0.621 0.6833 0.0481 0.85 138 1.3577 0.6363 0.0876 0.85 222 0.6548 0.7165 0.0497 0.85 234 -0.5753 0.5557 0.046 0.85 246 -0.1871 0.6927 0.0321 0.85 258 1.0213 0.5182 0.0688 0.85 270 0.9252 0.456 0.0636 0.85 282 0.0892 0.5274 0.0305 0.85 294 -0.716 0.5012 0.0528 0.95 90 -0.4531 0.5431 0.0407 0.95 102 1.4668 0.536 0.0938 0.95 114 0.3448 0.6485 0.0366 0.95 126 0.7584 0.5788 0.0549 0.95 138 0.0531 0.6626 0.0302 0.95 150 0.7789 0.5779 0.0559 0.95 234 0.097 0.5798 0.0306 0.95 246 -0.2594 0.6517 0.0339 0.95 258 0.8538 0.4297 0.0598 0.95 270 0.658 0.5286 0.0499 0.95 282 -0.4745 0.5947 0.0416 0.95 294 -1.0611 0.5693 0.071