CLAS physics database search results Measurement E151M2164 EG4 Xiaochao Zheng 2016 cos(theta_pi+) phi(pi+) A_LL Stat. error Syst. error degrees 0.45 282 0.3798 0.677 0.0407 0.45 294 -1.1894 0.6058 0.0913 0.55 282 0.5453 0.6607 0.0496 0.55 294 1.4702 0.5865 0.1107 0.65 270 0.0144 0.6458 0.03 0.65 282 -0.5342 0.66 0.049 0.65 294 -0.8829 0.5135 0.0707 0.75 66 0.8397 0.7268 0.0679 0.75 78 -0.6163 0.6143 0.0538 0.75 90 0.474 0.5838 0.0456 0.75 270 -0.9298 0.5907 0.0738 0.75 282 0.3511 0.5702 0.0393 0.75 294 0.5831 0.6135 0.0518 0.85 54 0.0849 0.6687 0.0306 0.85 66 -0.6031 0.5452 0.053 0.85 78 1.0252 0.5196 0.0802 0.85 90 0.2999 0.5109 0.0371 0.85 102 0.3037 0.5453 0.0372 0.85 258 0.036 0.7092 0.0301 0.85 270 -0.3561 0.6852 0.0396 0.85 282 0.3404 0.6211 0.0388 0.85 294 0.3871 0.6324 0.0411 0.95 30 -0.4341 0.6826 0.0435 0.95 54 0.8411 0.5819 0.068 0.95 66 1.0845 0.571 0.0842 0.95 78 -0.4606 0.5537 0.0449 0.95 90 0.1571 0.6035 0.0321 0.95 102 -0.2084 0.6494 0.0336 0.95 114 -0.5907 0.602 0.0523