CLAS physics database search results Measurement E151M1811 EG4 Xiaochao Zheng 2016 cos(theta_pi+) phi(pi+) A_LL Stat. error Syst. error degrees 0.15 66 0.4949 0.9048 0.0424 0.35 66 1.0333 0.6789 0.0694 0.35 282 0.2707 0.8419 0.0342 0.35 294 -0.9454 0.8254 0.0647 0.55 114 -1.3995 0.7866 0.09 0.65 102 1.2973 0.6694 0.0841 0.65 114 -0.1523 0.6877 0.0314 0.65 258 1.1084 0.7997 0.0736 0.75 90 -0.5153 0.6518 0.0433 0.75 102 0.5143 0.6827 0.0433 0.75 114 0.1169 0.764 0.0308 0.75 126 -0.12 0.8462 0.0309 0.75 234 0.1779 0.7451 0.0319 0.75 246 0.442 0.7764 0.0402 0.75 258 -0.5083 0.7175 0.043 0.75 270 0.3593 0.6817 0.0371 0.85 66 -1.1959 0.7672 0.0784 0.85 78 1.0342 0.7264 0.0695 0.85 90 1.1654 0.7915 0.0767 0.85 102 0.9035 0.8357 0.0624 0.85 114 -0.583 0.6917 0.0463 0.85 126 0.3933 0.7661 0.0383 0.85 210 1.3347 0.8597 0.0863 0.85 234 -0.7124 0.7017 0.0526 0.85 246 -0.4794 0.7217 0.0418 0.85 258 -0.4545 0.5921 0.0407 0.85 270 0.1711 0.7237 0.0317 0.85 282 -0.0407 0.6346 0.0301 0.95 234 -0.4299 0.7487 0.0397 0.95 258 -0.2322 0.6892 0.0331 0.95 270 0.7338 0.6141 0.0536 0.95 282 -0.5698 0.6507 0.0457 0.95 294 -0.0458 0.6541 0.0301