CLAS physics database search results Measurement E151M1986 EG4 Xiaochao Zheng 2016 cos(theta_pi+) phi(pi+) A_LL Stat. error Syst. error degrees 0.45 66 -0.1536 0.6646 0.0316 0.55 78 1.0182 0.5705 0.0727 0.65 78 0.3079 0.6028 0.0361 0.65 246 -0.4027 0.5389 0.0398 0.65 258 1.3142 0.6001 0.0906 0.75 114 -1.4324 0.5784 0.0979 0.75 126 0.0115 0.7981 0.03 0.75 138 -0.1868 0.6716 0.0324 0.75 234 -0.6318 0.715 0.0509 0.75 246 -0.5634 0.6168 0.0474 0.75 258 0.0669 0.6293 0.0303 0.75 270 1.2178 0.5938 0.0847 0.85 114 -1.0368 0.7926 0.0738 0.85 126 0.4695 0.7226 0.0428 0.85 138 -0.1121 0.7997 0.0309 0.85 234 0.3923 0.7433 0.0394 0.85 246 0.4617 0.6156 0.0425 0.85 258 1.346 0.5173 0.0926 0.85 270 -0.2455 0.6456 0.034 0.45 78 1.3441 1.4989 0.1271 0.55 78 0.4821 1.7187 0.0535 0.65 258 1.7491 1.4006 0.1635 0.75 126 0.1082 1.8368 0.0316 0.75 138 2.8243 1.6461 0.2613 0.75 246 -0.1608 1.4327 0.0334 0.75 258 0.8602 1.2326 0.0846 0.85 114 -2.208 1.9321 0.2051 0.85 138 -0.7356 2.0493 0.074 0.85 234 -0.8002 1.8166 0.0794 0.85 246 2.4812 1.584 0.23 0.85 258 -2.0053 1.3799 0.1867 0.85 270 -0.49 1.5582 0.0541