CLAS physics database search results Measurement E151M919 EG4 Xiaochao Zheng 2016 cos(theta_pi+) phi(pi+) A_UL Stat. error Syst. error degrees 0.65 126 -1.0739 1.7346 0.1036 0.75 210 3.6718 1.8939 0.3402 0.75 258 0.9115 1.5451 0.0893 0.75 282 0.955 1.5532 0.0931 0.85 114 1.6806 2.0961 0.158 0.85 126 -1.0941 2.0262 0.1053 0.45 270 -0.5529 0.5076 0.0471 0.55 210 -0.1794 0.6636 0.0322 0.55 270 0.2425 0.5586 0.034 0.65 138 -0.8807 0.5864 0.0651 0.75 66 -0.6054 0.5065 0.0498 0.75 198 0.6894 0.7608 0.0543 0.75 210 2.6083 2.6083 0.1738 0.85 126 0.5257 0.736 0.0457 0.85 222 0.3431 0.7697 0.0375 0.85 270 -0.7004 0.5652 0.0549