CLAS physics database search results Measurement E151M543 EG4 Xiaochao Zheng 2016 cos(theta_pi+) phi(pi+) A_UL Data errors Systematic errors degrees 0.15 66 0.2591 0.7663 0.0339 0.35 66 -0.7209 0.6288 0.0533 0.65 90 0.3546 0.6471 0.037 0.65 102 0.4938 0.7491 0.0426 0.65 258 0.0183 0.5699 0.03 0.75 90 -0.3261 0.6371 0.036 0.75 102 0.0349 0.6245 0.0301 0.75 126 0.1602 0.7135 0.0316 0.75 246 -0.456 0.6136 0.041 0.75 258 -1.0359 0.4971 0.0701 0.75 270 0.3013 0.6665 0.0352 0.75 282 -0.6064 0.4901 0.0477 0.85 90 0.1325 0.5824 0.0311 0.85 102 0.7554 0.6035 0.0551 0.85 114 -0.3581 0.5041 0.0371 0.85 222 0.1686 0.6359 0.0317 0.85 234 -0.0168 0.5689 0.03 0.85 246 -0.8711 0.4421 0.0611 0.85 258 -0.039 0.5211 0.0301 0.85 270 -0.0833 0.5218 0.0304 0.85 282 -0.4295 0.5055 0.0399 0.85 294 -0.4069 0.4064 0.039 0.95 90 -0.6075 0.4905 0.0478 0.95 102 -0.4452 0.5429 0.0405 0.95 258 -0.4687 0.5358 0.0415 0.95 270 0.5576 0.6044 0.0454 0.95 282 0.3576 0.5335 0.0371 0.95 294 -0.6229 0.4528 0.0485 0.95 306 0.6002 0.5391 0.0474