CLAS physics database search results Measurement E151M673 EG4 Xiaochao Zheng 2016 cos(theta_pi+) phi(pi+) A_UL Stat. error Syst. error degrees 0.35 78 -0.0526 0.8507 0.0302 0.35 90 1.1926 0.8873 0.0789 0.35 282 0.2007 0.6174 0.0324 0.45 78 -0.3108 0.6651 0.0355 0.45 126 0.0106 0.855 0.03 0.45 270 -0.7571 0.6642 0.0552 0.45 282 1.1265 0.7343 0.0751 0.45 294 -1.1012 0.6344 0.0737 0.55 126 -1.0449 0.6967 0.0706 0.55 210 1.6546 0.839 0.1056 0.55 222 0.8586 0.801 0.0605 0.55 258 0.0671 0.8038 0.0303 0.55 270 1.2138 0.6521 0.0801 0.55 282 1.8096 0.7409 0.1147 0.65 78 -0.5439 0.7537 0.0448 0.65 114 0.4716 0.812 0.0416 0.65 126 0.9553 0.7517 0.0657 0.65 138 -0.6234 0.6271 0.0485 0.65 150 -0.6137 0.7171 0.0481 0.65 198 -0.2024 0.6279 0.0325 0.65 210 1.2271 0.7426 0.0808 0.65 222 0.8089 0.647 0.0579 0.65 258 0.6563 0.8285 0.0501 0.65 294 0.3055 0.6072 0.0353 0.75 66 -0.6113 0.6278 0.0479 0.75 78 0.2984 0.8142 0.0351 0.75 126 -0.3167 0.737 0.0357 0.75 138 -1.3035 0.5948 0.0852 0.75 198 0.8662 0.8096 0.0609 0.75 210 1.1857 0.7408 0.0785 0.75 222 0.29 0.5841 0.0349 0.75 234 -0.91 0.5882 0.0632 0.75 270 -0.1527 0.5084 0.0314 0.75 282 -0.5162 0.5304 0.0436 0.75 294 -0.303 0.7414 0.0353 0.85 102 -0.0839 0.5917 0.0304 0.85 114 -0.0002 0.5493 0.03 0.85 126 0.6885 0.6709 0.0517 0.85 198 -0.4611 0.7085 0.0412 0.85 210 1.7652 0.5888 0.1121 0.85 222 0.6648 0.6369 0.0505 0.85 234 0.7363 0.6348 0.0541 0.85 246 1.8339 0.7092 0.1161