CLAS physics database search results Measurement E151M784 EG4 Xiaochao Zheng 2016 cos(theta_pi+) phi(pi+) A_UL Stat. error Syst. error degrees 0.65 90 -0.548 0.5462 0.0468 0.65 102 0.2827 0.5389 0.0353 0.65 114 -0.3583 0.6227 0.0381 0.65 258 -0.5552 0.4209 0.0496 0.65 270 0.7613 0.5377 0.0758 0.75 90 0.4083 0.4731 0.0423 0.75 102 1.2649 0.4845 0.0912 0.75 114 -0.1651 0.5724 0.0412 0.75 126 0.5652 1.4686 0.0602 0.75 246 0.1574 0.5103 0.0678 0.75 258 -0.1492 0.5484 0.0316 0.75 270 -0.8508 0.4436 0.0651 0.75 282 -0.1869 0.479 0.0593 0.85 90 -0.3174 0.5426 0.0365 0.85 102 0.4181 0.541 0.1152 0.85 114 -0.4729 0.4778 0.0497 0.85 126 -0.6519 0.589 0.0757 0.85 222 -1.7301 1.1854 0.1625 0.85 234 1.0549 0.6374 0.0786 0.85 246 -0.3753 0.4728 0.0662 0.85 258 0.1108 0.5176 0.0338 0.85 270 -0.6681 0.4042 0.0531 0.85 282 -0.019 0.4401 0.058 0.95 114 -2.8947 3.8741 0.2688 0.95 126 -2.888 3.8214 0.2682 0.95 270 -1.2054 3.0432 0.1152 0.95 282 3.7819 3.5768 0.3503 0.95 294 -3.1019 2.4708 0.2878 0.95 306 -1.8336 3.2072 0.1719 0.85 294 0.2185 0.544 0.0333 0.95 102 0.5663 0.9996 0.0478 0.95 138 -0.3401 1.0419 0.0374 0.95 234 -0.1213 1.0987 0.031 0.95 258 1.4283 0.8646 0.0984 0.95 270 -0.0581 0.8771 0.0302 0.95 282 -0.3996 0.8629 0.0398 0.95 294 0.8244 0.8041 0.0619 0.95 306 -0.3302 0.9253 0.037