CLAS physics database search results Measurement E151M2410 EG4 Xiaochao Zheng 2016 cos(theta_pi+) phi(pi+) A_LL Stat. error Syst. error degrees 0.75 270 -1.0632 1.0558 0.0827 0.85 102 -0.1398 0.8968 0.0317 0.85 114 -0.4299 0.8724 0.0433 0.85 126 1.3595 1.0905 0.103 0.85 174 -1.3785 0.9351 0.1044 0.85 186 -2.586 0.7791 0.1899 0.85 198 2.4612 0.7898 0.181 0.85 210 1.3285 0.9372 0.1009 0.85 222 0.1554 1.0702 0.032 0.85 234 0.888 1.06 0.071