CLAS physics database search results Measurement E151M1909 EG4 Xiaochao Zheng 2016 cos(theta_pi+) phi(pi+) A_LL Stat. error Syst. error degrees 0.35 18 -1.1711 0.723 0.077 0.35 270 -0.4733 0.6295 0.0415 0.35 282 -0.0885 0.761 0.0305 0.45 78 -0.6822 0.6864 0.0511 0.45 270 -0.6777 0.6974 0.0509 0.45 282 -1.8771 0.6084 0.1176 0.45 294 0.8827 0.7769 0.0613 0.55 78 -1.0076 0.7145 0.068 0.55 126 -2.1683 0.6126 0.1348 0.55 138 -0.6901 0.8265 0.0515 0.55 210 -0.5507 0.8282 0.0449 0.55 222 0.1793 0.8107 0.0319 0.55 258 -0.9367 0.7976 0.0642 0.55 270 -0.1799 0.5959 0.0319 0.55 282 -0.7003 0.7265 0.052 0.65 114 -1.2392 0.7871 0.0809 0.65 126 -0.3967 0.7408 0.0384 0.65 198 -0.4574 0.7605 0.0408 0.65 210 -0.4257 0.7044 0.0396 0.65 222 -0.6485 0.6948 0.0494 0.65 258 1.0749 0.7811 0.0717 0.65 282 -0.873 0.6991 0.0608 0.65 294 0.7635 0.6996 0.0551 0.75 66 -0.1583 0.671 0.0315 0.75 126 0.8854 0.8364 0.0615 0.75 198 -1.6734 0.7889 0.1057 0.75 210 -0.5678 0.7311 0.0456 0.75 222 -0.1265 0.6483 0.031 0.75 234 -1.1306 0.7183 0.0748 0.75 246 0.1451 0.8439 0.0313 0.75 270 -0.5298 0.5648 0.0439 0.75 282 0.261 0.6045 0.0339 0.75 294 0.2223 0.7045 0.0329 0.85 114 -0.7094 0.7489 0.0524 0.85 126 0.2555 0.732 0.0338 0.85 186 -0.6039 0.7892 0.0473 0.85 198 -1.4532 0.7361 0.093 0.85 210 -1.4419 0.4993 0.0924 0.85 222 -0.2586 0.6243 0.0338 0.85 234 0.2152 0.7515 0.0327