CLAS physics database search results Measurement E151M1322 EG4 Xiaochao Zheng 2016 cos(theta_pi+) phi(pi+) A_LL Stat. error Syst. error degrees 0.55 258 1.1545 0.7246 0.1336 0.55 270 0.3216 0.658 0.0471 0.65 246 0.3813 0.5831 0.0524 0.65 258 0.6006 0.7058 0.0741 0.65 270 -0.2396 0.6432 0.0404 0.65 282 -0.4076 0.7519 0.0549 0.75 138 0.7735 0.7864 0.0923 0.75 150 -0.4076 0.8739 0.0549 0.75 246 -0.9557 0.6225 0.1119 0.75 258 -0.0426 0.7644 0.0304 0.75 270 0.5045 0.6611 0.0643 0.75 282 1.1127 0.6582 0.129 0.75 294 0.6105 0.8301 0.0751 0.85 126 1.2286 0.7816 0.1418 0.85 138 -0.0147 0.7109 0.03 0.85 150 -0.1782 0.7582 0.0361 0.85 162 -0.1144 0.72 0.0327 0.85 186 1.7699 0.6422 0.2019 0.85 246 0.3056 0.7994 0.0457 0.85 258 1.4305 0.6033 0.1641 0.85 270 0.9821 0.6481 0.1148 0.85 282 -0.9701 0.5481 0.1135 0.85 294 1.1508 0.6944 0.1332 0.95 102 1.5428 0.6547 0.1766 0.95 114 -0.3165 0.7915 0.0466 0.95 138 0.5133 0.7314 0.0652 0.95 162 -0.6894 0.6507 0.0833 0.95 174 0.6708 0.6255 0.0814 0.95 258 1.9358 1.9358 0.2204