CLAS physics database search results Measurement E151M675 EG4 Xiaochao Zheng 2016 cos(theta_pi+) phi(pi+) A_UL Stat. error Syst. error degrees 0.45 270 0.212 0.7976 0.0327 0.55 126 -0.0573 0.7564 0.0302 0.55 270 1.0612 0.7484 0.0715 0.55 282 1.7322 0.7679 0.1101 0.65 126 0.6054 0.7276 0.0477 0.65 138 -1.1673 0.6547 0.0774 0.65 222 0.6869 0.7595 0.0516 0.65 294 2.683 2.683 0.1668 0.75 138 -2.2033 0.43 0.1381 0.75 198 1.1195 0.7589 0.0748 0.75 210 0.1963 0.6979 0.0323 0.75 222 1.0546 0.6471 0.0711 0.75 270 -0.0001 0.6889 0.03 0.75 282 0.1498 0.6817 0.0314 0.75 294 -0.3671 0.7068 0.0375 0.85 102 -0.5627 0.7172 0.0457 0.85 114 0.6909 0.7133 0.0518 0.85 198 -0.506 0.7162 0.0431 0.85 210 0.7674 0.7993 0.0557 0.85 222 0.2739 0.7095 0.0344 0.85 234 0.7047 0.7271 0.0525 0.95 222 -1.1417 0.5165 0.076