CLAS physics database search results Measurement E151M1080 EG4 Xiaochao Zheng 2016 cos(theta_pi+) phi(pi+) A_UL Stat. error Syst. error degrees 0.45 90 -0.3524 0.8621 0.0395 0.45 102 0.9944 1.045 0.0786 0.45 282 0.5099 0.8602 0.0478 0.55 90 0.2328 0.8138 0.0345 0.55 102 -0.857 0.6588 0.0695 0.55 114 -1.3358 0.6453 0.1021 0.65 90 -0.8158 0.7134 0.0667 0.65 102 -0.0052 0.7174 0.03 0.65 114 -0.2936 0.8292 0.0369 0.65 126 -0.9429 0.7664 0.0752 0.65 234 0.2984 0.9014 0.0371 0.65 306 1.4241 0.8867 0.1083 0.75 54 -0.1061 0.8606 0.031 0.75 66 -0.8737 0.6635 0.0706 0.75 90 -0.4169 0.6699 0.0428 0.75 102 0.5139 0.756 0.0481 0.75 114 0.2263 0.7367 0.0343 0.75 126 -1.8897 0.5889 0.1413 0.75 210 0.0415 0.9247 0.0302 0.75 222 -0.536 0.7666 0.0493 0.75 234 1.241 0.7761 0.0955 0.75 246 1.1399 0.7258 0.0886 0.75 258 1.168 0.8643 0.0905 0.75 270 0.0814 0.8711 0.0306 0.85 54 -0.4817 0.6758 0.0463 0.85 66 0.0228 0.6201 0.03 0.85 78 0.5824 0.8785 0.0521 0.85 114 -0.4673 0.6887 0.0455 0.85 126 -0.5692 0.7998 0.0513 0.85 174 0.5676 0.9922 0.0512 0.85 198 0.1208 0.8517 0.0313 0.85 210 -0.561 0.7114 0.0508 0.85 222 0.2097 0.8429 0.0337 0.85 234 1.3032 0.8042 0.0999 0.85 246 1.0231 0.6916 0.0806 0.85 258 0.3124 0.5646 0.0377 0.85 270 -0.4103 0.4951 0.0424 0.85 282 -0.2755 0.6197 0.0361 0.95 186 -0.796 0.6996 0.0655 0.95 222 0.1046 0.7068 0.031 0.95 234 0.1003 0.6658 0.0309 0.95 246 0.1599 0.6593 0.0322 0.95 258 -0.6433 0.5325 0.0558 0.95 270 -0.0264 0.6712 0.0301 0.95 282 -0.1457 0.5559 0.0318 0.95 294 -1.0364 0.502 0.0815 0.95 306 -0.6939 0.4678 0.0589 0.95 318 0.0496 0.5119 0.0302 0.95 330 0.3908 0.7211 0.0414