CLAS physics database search results Measurement E151M866 EG4 Xiaochao Zheng 2016 cos(theta_pi+) phi(pi+) A_UL Stat. error Syst. error degrees 0.45 282 -0.0433 0.4904 0.0501 0.75 114 -1.451 0.605 0.0998 0.75 126 -0.1796 0.7697 0.0322 0.75 138 -1.2635 0.6458 0.0882 0.75 234 0.8596 0.6884 0.0639 0.75 246 -0.2356 0.7497 0.0337 0.75 258 1.1556 0.8032 0.0816 0.85 78 -0.3205 0.6993 0.0366 0.85 114 -0.1502 0.7668 0.0316 0.85 222 0.8395 0.875 0.0627 0.85 234 -0.0439 0.6967 0.0301 0.85 246 0.3375 0.7566 0.0373 0.95 210 2.0747 1.461 0.1394 0.95 246 0.1769 1.0769 0.0322 0.95 258 0.5275 1.0066 0.0458 0.95 270 1.5895 1.0781 0.1085 0.65 102 -0.1042 0.9822 0.0315 0.65 126 0.8843 0.9864 0.087 0.75 102 0.4428 1.0166 0.0507 0.75 114 0.1786 1.0754 0.0342 0.75 222 0.6866 0.9378 0.0701 0.75 234 -0.5321 0.8204 0.0575 0.85 234 -0.9057 0.854 0.0888 0.85 246 -0.7988 0.7125 0.0796 0.85 258 0.3906 0.8435 0.0469 0.95 234 2.3047 2.7787 0.2148 0.95 258 -1.134 2.3165 0.1089