CLAS physics database search results Measurement E151M480 EG4 Xiaochao Zheng 2016 cos(theta_pi+) phi(pi+) A_UL Stat. error Syst. error degrees 0.35 66 0.738 0.5692 0.0542 0.45 66 -0.3516 0.5087 0.0369 0.45 78 -0.97 0.372 0.0665 0.45 282 -0.3587 0.4134 0.0372 0.55 78 -0.0911 0.5918 0.0305 0.55 270 0.0271 0.5544 0.03 0.55 282 -0.1776 0.3911 0.0319 0.65 258 0.3572 0.5424 0.0371 0.65 270 0.2856 0.4222 0.0347 0.65 282 0.0813 0.3963 0.0304 0.75 90 -0.5245 0.4983 0.0439 0.75 258 -0.1706 0.3671 0.0318 0.75 270 0.372 0.3611 0.0377 0.75 282 1.1032 0.4407 0.0738 0.85 90 -0.2884 0.3973 0.0348 0.85 102 -0.3386 0.3508 0.0365 0.85 114 -0.4724 0.353 0.0417 0.85 126 -0.3994 0.4081 0.0387 0.85 258 -0.9499 0.3633 0.0654 0.85 270 -0.4407 0.3821 0.0403 0.85 282 0.4735 0.5484 0.0417 0.95 78 -0.268 0.4384 0.0342 0.95 90 -0.4248 0.3447 0.0397 0.95 102 0.2282 0.4202 0.0331 0.95 114 -0.0465 0.4615 0.0301 0.95 126 0.2062 0.3942 0.0325 0.95 138 0.3657 0.4087 0.0374 0.95 150 0.0962 0.4451 0.0306 0.95 174 0.6492 0.4603 0.0498