CLAS physics database search results Measurement E151M210 EG4 Xiaochao Zheng 2016 cos(theta_pi+) phi(pi+) A_UL Data errors Systematic errors degrees 0.45 282 0.6865 0.7765 0.0511 0.45 294 -0.4261 0.5419 0.0395 0.55 270 -0.0835 0.5749 0.0304 0.55 282 -0.8843 0.3009 0.0611 0.55 294 -0.4694 0.4798 0.0412 0.65 270 0.7634 0.7571 0.0549 0.65 282 0.058 0.5735 0.0302 0.75 270 0.4258 0.7913 0.0395 0.75 282 -0.4155 0.4314 0.0391 0.85 102 0.4691 0.8683 0.0412 0.95 114 0.0979 0.638 0.0306 0.95 126 -0.0337 0.551 0.0301 0.95 138 0.0745 0.6334 0.0303 0.95 150 0.4686 0.7457 0.0412 0.95 198 0.0631 0.5901 0.0302 0.35 294 -0.3756 0.4522 0.038 0.45 282 0.4745 0.4211 0.042 0.55 270 0.1609 0.382 0.0316 0.55 282 -0.0157 0.3882 0.03 0.55 294 -0.1371 0.4424 0.0312 0.65 270 0.2983 0.3549 0.0352 0.65 282 -0.4009 0.3568 0.0389 0.75 258 0.9529 0.4562 0.0662 0.75 270 -0.0629 0.4179 0.0303 0.75 282 -0.3549 0.3686 0.0372 0.85 102 -0.8033 0.4397 0.0581 0.85 126 0.5752 0.4861 0.0466 0.95 114 -0.2892 0.3716 0.0349 0.95 126 0.2338 0.4119 0.0333 0.95 138 -0.7055 0.324 0.053 0.95 150 -0.7698 0.328 0.0563 0.95 162 -0.0981 0.4026 0.0306 0.95 186 0.563 0.3275 0.046