CLAS physics database search results Measurement E151M1093 EG4 Xiaochao Zheng 2016 cos(theta_pi+) phi(pi+) A_UL Stat. error Syst. error degrees 0.55 90 -0.1533 0.8773 0.032 0.55 102 -1.6078 0.6213 0.1213 0.65 90 -1.4145 0.5727 0.1076 0.65 102 -1.4071 0.6053 0.1071 0.65 114 -0.5545 0.8481 0.0504 0.75 66 0.9106 0.8589 0.073 0.75 78 -0.562 0.7976 0.0509 0.75 102 0.041 0.7127 0.0301 0.75 114 0.7977 1.0014 0.0656 0.75 210 2.6445 0.9609 0.1956 0.75 222 0.8691 0.887 0.0703 0.75 234 -0.2303 0.6682 0.0344 0.75 246 1.5898 0.9228 0.12 0.85 54 -0.4317 0.6949 0.0435 0.85 66 -0.4315 0.7353 0.0435 0.85 78 -0.1498 0.8458 0.0319 0.85 114 -2.0671 0.4438 0.154 0.85 210 -0.0993 0.7065 0.0309 0.85 222 1.0899 0.9156 0.0851 0.85 234 0.3546 0.7532 0.0396 0.85 246 1.2654 0.6783 0.0972 0.85 258 -0.4306 0.5518 0.0435 0.85 270 0.6675 0.7517 0.0573 0.85 282 0.2093 0.803 0.0337 0.95 186 -1.0228 0.698 0.0805 0.95 210 -0.0785 0.8003 0.0305 0.95 222 1.2325 0.9177 0.0949 0.95 234 0.1564 0.6424 0.0321 0.95 246 0.0978 0.6595 0.0308 0.95 258 -0.9065 0.596 0.0727 0.95 270 -0.2643 0.5347 0.0357 0.95 282 1.1192 0.7266 0.0871 0.95 294 0.9451 0.6535 0.0753 0.95 306 -0.0946 0.602 0.0308 0.95 318 -0.1335 0.5864 0.0315