CLAS physics database search results Measurement E151M483 EG4 Xiaochao Zheng 2016 cos(theta_pi+) phi(pi+) A_UL Data errors Systematic errors degrees 0.45 66 0.136 0.5483 0.0311 0.45 282 -0.253 0.481 0.0338 0.55 270 -0.4445 0.478 0.0405 0.55 282 -0.7005 0.4212 0.0523 0.65 270 0.449 0.4615 0.0407 0.65 282 0.4161 0.4908 0.0393 0.65 294 -0.1937 0.4642 0.0323 0.75 90 0.6914 0.6298 0.0519 0.75 102 0.5098 0.5544 0.0433 0.75 258 -0.4278 0.4775 0.0398 0.75 270 0.8543 0.5596 0.0603 0.75 294 -0.6114 0.4123 0.0479 0.85 78 0.7502 0.4977 0.0548 0.85 90 0.0144 0.4339 0.03 0.85 102 -0.2874 0.4344 0.0348 0.85 114 0.5551 0.462 0.0453 0.85 126 -0.0281 0.5463 0.03 0.85 258 -0.4597 0.4406 0.0411 0.85 270 0.3658 0.4782 0.0374 0.85 282 0.01 0.5362 0.03 0.85 294 0.4375 0.5517 0.0402 0.95 90 -0.5246 0.4472 0.0439 0.95 102 -0.3644 0.4071 0.0374 0.95 114 0.3013 0.4787 0.0352 0.95 138 -0.5041 0.4171 0.043