CLAS physics database search results Measurement E151M2396 EG4 Xiaochao Zheng 2016 cos(theta_pi+) phi(pi+) A_LL Stat. error Syst. error degrees 0.55 114 0.1212 1.035 0.0313 0.65 126 0.6818 1.0661 0.0578 0.65 198 -0.9902 0.9473 0.0778 0.65 282 -0.4526 0.8758 0.0445 0.75 102 -1.1171 0.8149 0.0864 0.75 114 -0.0744 1.0854 0.0305 0.75 126 -1.1633 1.0364 0.0895 0.75 186 -3.2266 3.2266 0.2359 0.75 198 0.535 1.0601 0.049 0.75 210 -1.6807 0.8878 0.1255 0.75 222 -0.4841 0.9797 0.0462 0.75 234 -1.7669 0.9503 0.1316 0.75 270 1.2773 0.7464 0.0974 0.75 282 0.4526 0.8154 0.0445 0.85 90 -0.9849 0.9653 0.0775 0.85 102 -0.8829 0.7901 0.0707 0.85 114 -0.7563 0.8235 0.0625 0.85 126 0.4268 0.8877 0.0431 0.85 174 -0.6285 0.9519 0.0546 0.85 186 -1.2448 0.8991 0.0951 0.85 198 -0.4009 0.7086 0.0418 0.85 210 -1.3138 0.736 0.0999 0.85 222 0.2405 0.8355 0.0347 0.85 234 -1.1601 0.979 0.0893 0.85 282 -0.8308 0.8977 0.0673 0.95 114 0.4224 1.0327 0.0429 0.95 198 -0.5825 0.9773 0.0518 0.95 210 1.4527 0.8253 0.1095