CLAS physics database search results Measurement E151M1923 EG4 Xiaochao Zheng 2016 cos(theta_pi+) phi(pi+) A_LL Stat. error Syst. error degrees 0.55 222 -1.3934 0.6459 0.0896 0.65 138 -1.0886 0.6107 0.0725 0.65 222 -0.046 0.7268 0.0301 0.75 198 -1.1354 0.6005 0.0751 0.75 210 -0.8686 0.6173 0.0606 0.75 222 -0.9995 0.6264 0.0676 0.75 234 0.3486 0.6501 0.0367 0.75 270 0.5129 0.6104 0.0432 0.75 282 0.1691 0.5932 0.0317 0.85 114 -0.8444 0.6927 0.0593 0.85 126 -0.7013 0.6566 0.052 0.85 222 -0.4024 0.632 0.0387