CLAS physics database search results Measurement E151M632 EG4 Xiaochao Zheng 2016 cos(theta_pi+) phi(pi+) A_UL Stat. error Syst. error degrees 0.25 66 1.0333 0.7861 0.07 0.35 294 0.5647 0.8084 0.0458 0.45 282 1.2264 0.7777 0.0808 0.55 114 -1.0072 0.6794 0.0685 0.55 270 -0.2415 0.7396 0.0334 0.55 282 -0.0911 0.6435 0.0305 0.65 114 0.0556 0.5863 0.0302 0.65 126 -0.6599 0.7059 0.0503 0.65 222 0.6739 0.579 0.051 0.65 234 0.1146 0.6184 0.0308 0.65 246 -0.5835 0.6272 0.0466 0.65 294 -0.5502 0.5933 0.0451 0.75 102 -0.6296 0.5749 0.0488 0.75 114 1.0582 0.657 0.0713 0.75 126 -0.2773 0.6609 0.0345 0.75 138 -0.3352 0.6735 0.0363 0.75 210 1.7713 0.7407 0.1124 0.75 222 1.2032 0.7892 0.0795 0.75 234 1.599 0.6077 0.1023 0.75 246 0.8127 0.5767 0.0581 0.75 258 0.3415 0.6188 0.0366 0.85 78 -0.621 0.7027 0.0484 0.85 90 1.2488 0.6597 0.0821 0.85 114 -0.0096 0.7669 0.03 0.85 138 -1.6475 0.4845 0.1051 0.85 210 0.6508 0.6725 0.0498 0.85 222 1.5846 0.5968 0.1015 0.85 234 1.4061 0.5348 0.0911 0.85 246 0.1771 0.6602 0.0319 0.85 258 0.3253 0.526 0.036 0.95 90 -0.2246 0.6037 0.033 0.95 198 0.4545 0.7298 0.0409 0.95 222 0.8012 0.7581 0.0575 0.95 246 0.8599 0.5578 0.0605 0.95 258 -0.7794 0.4523 0.0563 0.95 270 -0.0481 0.5071 0.0301