CLAS physics database search results Measurement E151M659 EG4 Xiaochao Zheng 2016 cos(theta_pi+) phi(pi+) A_UL Stat. error Syst. error degrees 0.45 78 1.6953 0.892 0.1079 0.45 282 0.4059 0.8622 0.0389 0.55 222 2.3653 0.7376 0.1477 0.55 270 2.029 0.7006 0.1277 0.55 282 -0.1509 0.7788 0.0314 0.65 126 -0.8169 0.6673 0.0583 0.65 150 -1.3289 0.6044 0.0866 0.65 198 -0.0874 0.8467 0.0305 0.65 210 0.134 0.8403 0.0311 0.65 222 0.5929 0.6791 0.0471 0.65 294 1.2259 0.73 0.0808 0.75 126 -0.4419 0.6802 0.0404 0.75 138 -0.6575 0.6865 0.0502 0.75 210 0.6687 0.8588 0.0507 0.75 222 0.9074 0.9015 0.0631 0.75 234 0.3124 0.5989 0.0356 0.75 246 0.3583 0.8662 0.0372 0.75 270 0.5274 0.7749 0.044 0.75 282 -0.1264 0.5866 0.031 0.75 294 0.8928 0.6591 0.0623 0.85 102 -0.8051 0.6358 0.0577 0.85 114 0.1768 0.7757 0.0319 0.85 210 -0.2129 0.7672 0.0327 0.85 222 0.038 0.5513 0.0301 0.85 234 0.592 0.6613 0.047 0.85 246 0.3663 0.7172 0.0374 0.95 234 0.4216 0.7734 0.0396