CLAS physics database search results Measurement E151M2133 EG4 Xiaochao Zheng 2016 cos(theta_pi+) phi(pi+) A_LL Stat. error Syst. error degrees 0.45 270 0.1503 0.553 0.0328 0.55 126 -0.9795 1.1834 0.0949 0.55 258 -0.8739 1.0137 0.0857 0.55 270 0.6429 0.946 0.0663 0.55 282 -0.983 0.8943 0.0952 0.65 222 0.7134 0.9796 0.0721 0.65 294 0.1712 0.9044 0.0339 0.75 66 2.2565 1.1335 0.2095 0.75 210 -2.2216 1.0983 0.2064 0.75 222 1.0476 0.9389 0.1008 0.75 270 0.3949 0.9359 0.0471 0.75 282 -0.6556 0.813 0.0673 0.85 102 -0.2386 1.4062 0.0372 0.85 114 -0.0727 1.1761 0.0307 0.85 126 -2.2733 1.4352 0.2111 0.85 210 0.775 1.1501 0.0773 0.85 222 -1.0053 1.0703 0.0971 0.45 282 -0.9621 0.6977 0.0694 0.55 126 -1.2786 0.677 0.0884 0.55 222 -0.1457 0.8797 0.0315 0.55 234 1.0006 0.8237 0.0717 0.55 258 -0.7453 0.7003 0.057 0.55 270 -0.5036 0.709 0.0444 0.65 126 -1.2249 0.6745 0.0851 0.65 138 -0.4193 0.7873 0.0405 0.75 210 0.0686 0.8644 0.0303 0.75 222 0.0767 0.8127 0.0304 0.75 234 1.3139 0.6896 0.0906 0.75 282 -0.6356 0.6091 0.0511 0.75 294 0.292 0.6815 0.0355 0.85 102 -0.9414 0.6761 0.0682 0.85 114 -0.8408 0.6873 0.0624 0.85 126 0.364 0.8181 0.0382 0.85 198 -0.5898 0.9546 0.0487 0.85 210 -1.2502 0.6997 0.0867 0.85 222 -1.1804 0.7723 0.0824 0.85 246 0.6367 0.9202 0.0511