CLAS physics database search results Measurement E151M1956 EG4 Xiaochao Zheng 2016 cos(theta_pi+) phi(pi+) A_LL Stat. error Syst. error degrees 0.55 282 0.3713 0.4488 0.0385 0.65 258 -1.2616 0.4676 0.0874 0.65 270 0.4899 0.5281 0.0438 0.65 282 -0.6536 0.4622 0.052 0.75 258 -0.092 0.46 0.0306 0.75 270 0.3447 0.4938 0.0375 0.75 282 -0.1727 0.4705 0.032 0.85 90 0.5093 0.5397 0.0447 0.85 102 0.0416 0.5832 0.0301 0.85 114 -0.4647 0.5049 0.0426 0.85 126 0.3057 0.4755 0.036 0.85 258 0.7828 0.5019 0.0591 0.85 270 -0.7091 0.4637 0.055 0.95 114 -0.5738 0.8445 0.0479 0.95 126 -0.0937 0.9459 0.0306 0.95 138 0.1998 0.8428 0.0327 0.95 150 2.5377 0.764 0.1678 0.45 66 -3.9247 2.4961 0.3619 0.65 270 0.1515 2.2134 0.0331 0.65 282 -1.2881 2.2167 0.1221 0.75 270 -1.2316 1.7626 0.1171 0.75 282 -3.4033 2.2259 0.3142 0.85 90 -1.7835 3.2915 0.1666 0.85 102 -2.4151 3.1825 0.224 0.85 114 3.4317 2.9121 0.3168 0.85 126 -4.9134 3.0332 0.4525 0.85 258 -1.8718 2.7178 0.1746 0.85 270 5.7325 2.5215 0.5277 0.95 102 21.9198 8.1305 2.0147 0.95 114 1.8858 9.6649 0.1759 0.95 126 5.1195 8.6161 0.4714 0.95 138 7.7192 0.7892 -0.4668 0.95 150 3.7592 9.4176 0.3468 0.95 174 0.0002 8.9754 0.03