CLAS physics database search results Measurement E151M1429 EG4 Xiaochao Zheng 2016 cos(theta_pi+) phi(pi+) A_LL Stat. error Syst. error degrees 0.55 270 -0.38 0.4614 0.0433 0.55 282 -0.1175 0.3765 0.0323 0.65 258 -0.9955 0.5613 0.0652 0.65 270 0.0127 0.3824 0.0375 0.65 282 0.052 0.3748 0.0366 0.75 258 0.117 0.3959 0.0369 0.75 270 0.1282 0.3753 0.0324 0.85 126 -1.1055 0.6191 0.0709 0.85 138 -0.0356 0.7443 0.0301 0.85 150 -1.397 0.5257 0.0866 0.85 162 0.5465 0.7554 0.0437 0.85 186 -0.0174 0.8269 0.03 0.85 270 -0.561 0.6462 0.0443 0.95 126 0.6123 0.7899 0.0466 0.95 138 0.3919 0.6676 0.0377 0.95 150 -0.0719 0.6425 0.0303 0.95 162 0.987 0.5448 0.0648 0.95 174 0.3596 0.5658 0.0366 0.95 186 -0.3869 0.6576 0.0375 0.95 210 -0.2274 0.6457 0.0328 0.75 282 -1.3142 0.61 0.0843 0.85 126 -0.3329 0.5772 0.036 0.85 138 -0.0569 0.6266 0.0302 0.85 150 0.1102 0.5619 0.0307 0.85 162 0.6558 0.6142 0.0494 0.85 186 -0.2872 0.5517 0.0346 0.85 258 0.046 0.5429 0.0301 0.95 126 0.4943 0.4857 0.0422 0.95 138 -0.0462 0.4631 0.0301 0.95 162 -0.0473 0.4646 0.0301 0.95 174 0.8519 0.4579 0.0592 0.95 186 -0.9257 0.4812 0.0631 0.95 198 0.3847 0.5081 0.0378