CLAS physics database search results Measurement E151M2100 EG4 Xiaochao Zheng 2016 cos(theta_pi+) phi(pi+) A_LL Stat. error Syst. error degrees 0.65 234 -0.1199 0.8982 0.032 0.75 114 0.8045 0.8866 0.0798 0.75 210 0.3724 0.7921 0.0455 0.75 222 -0.2685 0.8646 0.0388 0.85 90 1.1041 1.0863 0.1058 0.85 222 -0.2201 0.978 0.0362 0.85 234 1.1242 0.8947 0.1076 0.85 246 0.4806 0.9726 0.0534 0.85 258 -0.0992 0.9682 0.0314 0.55 126 -0.2039 0.8439 0.0328 0.65 102 -1.1136 0.8348 0.0784 0.65 126 -0.1258 0.8177 0.0311 0.75 114 -0.3264 0.9732 0.0368 0.75 222 -1.3655 0.9598 0.0938 0.75 234 -0.036 0.9922 0.0301 0.75 294 1.2457 0.7735 0.0864 0.85 210 -0.4945 1.0612 0.044 0.85 222 -1.4666 0.9496 0.1 0.85 234 -0.7217 0.8339 0.0557 0.85 246 -1.6636 0.833 0.1123 0.85 258 0.236 1.0231 0.0337 0.95 246 1.4325 1.4936 0.0979 0.95 258 -1.3067 1.3309 0.0901