CLAS physics database search results Measurement E151M1647 EG4 Xiaochao Zheng 2016 cos(theta_pi+) phi(pi+) A_LL Stat. error Syst. error degrees 0.45 30 -0.2176 0.8557 0.0327 0.45 42 -0.7628 0.6601 0.0837 0.55 42 0.1616 0.9004 0.0315 0.55 210 -0.8498 0.882 0.0591 0.55 222 0.2095 0.9323 0.0325 0.55 234 -1.1107 0.8285 0.073 0.65 138 0.9368 0.8211 0.0637 0.65 162 -1.356 0.9431 0.0866 0.65 210 -0.3894 0.9801 0.038 0.65 222 0.0028 0.8911 0.03 0.65 234 0.9889 0.8345 0.0664 0.75 222 -1.4103 0.9098 0.0897 0.75 234 1.7954 0.7935 0.1117 0.75 246 0.3079 0.9614 0.0352 0.85 138 -0.0797 0.8942 0.0304 0.85 150 -0.8566 0.9229 0.0595 0.85 210 -0.2157 0.8968 0.0327 0.85 234 0.2043 0.9093 0.0324 0.45 54 -2.139 1.013 0.1279 0.45 234 -2.0972 0.7742 0.1256 0.55 222 0.2001 0.9865 0.0322 0.55 234 0.2547 1.1784 0.0335 0.65 138 -1.0586 1.2323 0.0685 0.65 210 -1.1317 0.9152 0.0723 0.65 222 1.0182 1.2392 0.0664 0.65 234 -0.9093 1.0029 0.0608 0.75 210 -1.2257 0.9329 0.0773 0.75 222 -1.1398 0.9917 0.0727 0.75 234 -0.2581 0.9566 0.0335 0.85 222 -0.0891 1.1083 0.0304 0.85 234 0.2195 1.1945 0.0326