CLAS physics database search results Measurement E151M284 EG4 Xiaochao Zheng 2016 cos(theta_pi+) phi(pi+) A_UL Data errors Systematic errors degrees 0.55 258 -0.5328 0.4553 0.046 0.55 270 -0.2887 0.3478 0.0541 0.65 246 -0.5978 0.3141 0.0486 0.65 258 0.0365 0.3466 0.0362 0.65 270 0.0673 0.3719 0.0313 0.65 282 -0.9787 0.3142 0.0669 0.75 102 0.399 0.5639 0.0396 0.75 114 -0.5045 0.3625 0.0438 0.75 126 0.3144 0.4256 0.0359 0.75 138 -0.1969 0.4541 0.0402 0.75 150 -1.0594 0.6162 0.0705 0.75 222 0.2654 0.8859 0.034 0.75 234 -0.6169 0.4167 0.0502 0.75 246 -0.0829 0.3272 0.0325 0.75 258 0.5161 0.3622 0.0438 0.75 270 -0.0186 0.332 0.0327 0.75 282 0.193 0.3765 0.0339 0.85 102 0.1229 0.3953 0.0328 0.85 114 0.014 0.3701 0.0304 0.85 126 -0.3807 0.3176 0.0401 0.85 138 -0.1774 0.383 0.0329 0.85 150 0.023 0.3963 0.0309 0.85 162 0.7516 0.4675 0.0552 0.85 174 0.7487 0.5053 0.0552 0.85 234 -0.3376 0.3943 0.0382 0.85 246 -0.1333 0.3149 0.0352 0.85 258 -0.368 0.3134 0.0409 0.85 270 -0.5577 0.2713 0.0483 0.85 282 -0.0701 0.2733 0.0453 0.85 294 0.9087 0.4174 0.0649 0.95 66 0.8134 0.4107 0.0584 0.95 78 -0.1793 0.3238 0.032 0.95 90 -0.4496 0.3851 0.0412 0.95 126 0.8477 0.9433 0.0592 0.95 138 0.6971 0.4332 0.0579 0.95 150 -0.8253 0.3256 0.0588 0.95 162 0.0496 0.5274 0.0302 0.95 174 -0.7488 0.468 0.0552 0.95 234 -1.0617 0.4388 0.0723 0.95 246 -0.5122 0.3398 0.0463 0.95 258 -0.4421 0.3469 0.0427 0.95 270 0.1082 0.3084 0.0387 0.95 282 -0.3678 0.3614 0.0438 0.95 294 0.6368 0.3844 0.0497