CLAS physics database search results Measurement E151M321 EG4 Xiaochao Zheng 2016 cos(theta_pi+) phi(pi+) A_UL Data errors Systematic errors degrees 0.55 246 0.2446 0.5845 0.0336 0.55 258 0.3769 0.492 0.0382 0.65 126 0.3399 0.4231 0.0601 0.65 138 1.3701 0.6101 0.09 0.65 222 -0.0681 0.5507 0.04 0.65 234 0.8072 0.4752 0.0584 0.65 246 0.0032 0.3851 0.0315 0.65 258 -0.547 0.4317 0.0591 0.75 114 -0.1305 0.4786 0.0311 0.75 126 -0.0987 0.4101 0.0344 0.75 138 -0.5886 0.3966 0.0471 0.75 150 -0.2394 0.4169 0.0522 0.75 162 -0.6399 0.7442 0.0488 0.75 210 -0.0998 0.6817 0.0306 0.75 222 -0.0994 0.393 0.0328 0.75 234 -0.2401 0.378 0.0338 0.75 246 0.1567 0.4115 0.0372 0.75 258 -0.2434 0.3497 0.0355 0.75 270 -0.3832 0.4247 0.0427 0.85 114 -0.699 0.4237 0.0694 0.85 126 -0.5461 0.4144 0.0453 0.85 138 -0.5242 0.3925 0.0452 0.85 150 0.1373 1.0018 0.0311 0.85 162 -0.664 0.4541 0.0506 0.85 222 0.4963 0.5957 0.0429 0.85 234 -0.0122 0.4574 0.0338 0.85 246 0.4986 0.3485 0.0521 0.85 258 -0.3087 0.3216 0.0487 0.85 270 0.3385 0.3445 0.0376 0.85 282 0.7621 0.4786 0.0574 0.95 90 -0.2948 0.7379 0.0349 0.95 102 -1.1366 0.2755 0.0765 0.95 114 1.8336 1.0909 0.1144 0.95 126 -0.3114 0.8506 0.0354 0.95 138 -0.5019 0.7231 0.0426 0.95 234 -0.0767 0.607 0.0304 0.95 246 -0.1306 0.3098 0.0518 0.95 258 -0.4197 0.3091 0.0423 0.95 270 0.4553 0.3772 0.0415 0.95 282 -0.7412 0.2922 0.0544