CLAS physics database search results Measurement E151M645 EG4 Xiaochao Zheng 2016 cos(theta_pi+) phi(pi+) A_UL Stat. error Syst. error degrees 0.35 66 -0.3756 0.783 0.0378 0.35 270 0.0925 0.8175 0.0305 0.45 282 1.3562 0.7813 0.0882 0.55 138 0.1427 0.8115 0.0312 0.55 222 -0.6388 0.6564 0.0493 0.55 234 0.2776 0.8079 0.0345 0.65 114 -0.7895 0.6558 0.0568 0.65 126 0.0696 0.7519 0.0303 0.65 138 -1.3012 0.6434 0.0851 0.65 210 0.965 0.8949 0.0662 0.65 222 1.6316 0.8481 0.1042 0.65 234 1.4776 0.8922 0.0952 0.75 114 -1.6123 0.44 0.1031 0.75 126 -1.0394 0.5542 0.0703 0.75 138 0.4767 0.8231 0.0418 0.75 198 0.896 0.9061 0.0625 0.75 210 -0.0475 0.5965 0.0301 0.75 222 0.3348 0.6954 0.0363 0.75 234 0.3872 0.6129 0.0382 0.75 246 0.7306 0.7019 0.0538 0.75 282 0.6003 0.8247 0.0474 0.85 90 -0.1216 0.6639 0.0309 0.85 102 -0.3264 0.7444 0.036 0.85 138 0.4793 0.7523 0.0419 0.85 210 0.913 0.7223 0.0634 0.85 222 0.5892 0.592 0.0469 0.85 234 0.9303 0.6465 0.0643 0.85 246 0.109 0.5811 0.0307 0.95 102 -0.7858 0.5979 0.0567 0.95 210 0.666 0.7452 0.0506 0.95 234 -0.1001 0.635 0.0306 0.95 246 0.7687 0.6524 0.0558