CLAS physics database search results Measurement E151M272 EG4 Xiaochao Zheng 2016 cos(theta_pi+) phi(pi+) A_UL Data errors Systematic errors degrees 0.55 246 -0.4858 0.4899 0.0425 0.55 258 -0.1377 0.5865 0.0312 0.65 126 -0.7327 0.5671 0.0544 0.65 138 0.8154 0.5569 0.0587 0.65 150 -0.222 0.5143 0.033 0.65 222 -0.864 0.52 0.0613 0.65 234 -0.1963 0.4425 0.0324 0.65 246 0.0716 0.4096 0.0303 0.65 258 -0.937 0.4602 0.0653 0.75 138 -0.2955 0.4344 0.0351 0.75 150 -0.4135 0.5635 0.0394 0.75 174 -1.4476 0.411 0.0945 0.75 222 0.5689 0.5106 0.0463 0.75 234 -0.5591 0.3885 0.0458 0.75 246 0.9102 0.438 0.0638 0.75 258 -0.4155 0.5048 0.0395 0.85 222 0.1392 0.4971 0.0312 0.85 234 0.3645 0.4114 0.0375 0.85 246 -0.427 0.3504 0.04 0.85 258 0.0452 0.4617 0.0301 0.45 42 0.5585 1.0835 0.0451 0.55 234 -0.2696 0.7197 0.0341 0.55 246 0.2409 0.7265 0.0333 0.55 258 -0.7722 0.618 0.0553 0.65 138 1.3325 1.0058 0.0857 0.65 210 -0.8072 0.6487 0.0571 0.65 222 0.1632 0.7365 0.0316 0.65 234 0.8771 0.7932 0.0607 0.65 246 0.0045 0.5834 0.03 0.65 258 -0.7951 0.4715 0.0565 0.75 138 1.6599 1.2537 0.1044 0.75 150 -0.2873 0.7749 0.0346 0.75 222 -0.5942 0.5515 0.0467 0.75 234 -0.5987 0.4455 0.0469 0.75 246 0.3136 0.5803 0.0355 0.75 258 -0.1134 0.5773 0.0308 0.85 222 1.3448 0.8327 0.0864 0.85 234 0.4547 0.6872 0.0406 0.85 246 -0.542 0.4539 0.0443 0.85 258 1.9824 1.9824 0.1231