CLAS physics database search results Measurement E151M634 EG4 Xiaochao Zheng 2016 cos(theta_pi+) phi(pi+) A_UL Stat. error Syst. error degrees 0.45 282 1.1843 0.7962 0.0784 0.65 114 -1.1457 0.5783 0.0762 0.65 234 0.3604 0.7728 0.0372 0.65 246 0.5598 0.8896 0.0455 0.75 102 1.8103 0.7796 0.1147 0.75 114 -1.4496 0.5017 0.0936 0.75 138 -0.6539 0.7143 0.05 0.75 222 1.7644 0.6445 0.112 0.75 234 0.7058 0.6691 0.0526 0.75 246 0.4217 0.7533 0.0396 0.75 258 0.9554 0.8235 0.0657 0.85 78 -0.6921 0.6181 0.0519 0.85 138 -0.2428 0.7545 0.0335 0.85 210 -0.7373 0.6538 0.0542 0.85 222 0.663 0.7172 0.0504 0.85 234 1.1983 0.7587 0.0792 0.85 246 0.0475 0.6293 0.0301 0.85 258 -0.0973 0.6726 0.0306 0.85 270 -0.2041 0.7044 0.0325 0.95 234 1.8549 0.6644 0.1174 0.95 258 0.3539 0.6201 0.037 0.95 270 -0.6463 0.568 0.0496 0.95 282 0.0062 0.5673 0.03