CLAS physics database search results Measurement E151M2419 EG4 Xiaochao Zheng 2016 cos(theta_pi+) phi(pi+) A_LL Stat. error Syst. error degrees 0.65 198 -1.4921 1.151 0.1123 0.75 102 0.21 1.0946 0.0336 0.75 114 -0.3221 1.0624 0.038 0.75 198 1.2236 1.1501 0.0937 0.75 210 1.7587 0.8385 0.131 0.75 258 -0.3996 1.0028 0.0417 0.75 270 -0.202 0.915 0.0334 0.75 282 0.686 0.9871 0.0581 0.85 102 -0.4042 0.8601 0.0419 0.85 114 -1.7984 0.7221 0.1338 0.85 126 -0.7726 1.0382 0.0635 0.85 186 -1.5704 0.9649 0.1178 0.85 198 -1.4434 0.7759 0.1089 0.85 210 -0.9069 0.8931 0.0723