CLAS physics database search results Measurement E151M307 EG4 Xiaochao Zheng 2016 cos(theta_pi+) phi(pi+) A_UL Data errors Systematic errors degrees 0.65 270 0.906 1.1044 0.0623 0.65 282 -0.1045 0.94 0.0307 0.75 126 -0.6567 0.8624 0.0496 0.75 246 -0.8105 0.6007 0.0573 0.85 102 -0.5539 0.8474 0.0449 0.85 114 -0.2632 1.0102 0.0339 0.85 126 0.9587 1.2115 0.0651 0.85 150 0.3103 1.0193 0.0353 0.85 258 1.6438 1.2439 0.1034 0.85 282 1.6967 1.1966 0.1065 0.85 294 0.3933 0.7748 0.0382 0.85 306 -0.5731 0.7281 0.0457 0.95 294 0.2293 0.9609 0.033 0.55 258 -0.9783 0.6407 0.0676 0.65 258 -0.4518 0.5992 0.041 0.65 270 -0.5778 0.5961 0.0467 0.75 234 -0.1469 0.6823 0.0313 0.75 246 -0.5243 0.6142 0.0442 0.75 270 -0.0119 0.6587 0.03 0.75 282 -0.8153 0.6146 0.0587 0.85 114 -0.5027 0.6288 0.0432 0.85 126 -0.6913 0.6296 0.0523 0.85 138 0.1649 0.616 0.0317 0.85 234 -0.043 0.6513 0.0301 0.85 246 -0.2661 0.6096 0.0342 0.85 258 -0.0391 0.6419 0.0301 0.85 270 -1.2491 0.4796 0.083 0.85 282 0.1761 0.559 0.0319 0.85 294 -1.4516 0.4933 0.0948 0.85 306 0.0014 0.6359 0.03 0.95 138 -0.1393 0.6046 0.0312 0.95 270 0.0255 0.5293 0.03 0.95 294 0.2014 0.528 0.0325