CLAS physics database search results Measurement E151M2020 EG4 Xiaochao Zheng 2016 cos(theta_pi+) phi(pi+) A_LL Stat. error Syst. error degrees 0.65 90 -1.6859 1.3385 0.1578 0.65 102 -1.0065 1.3692 0.0972 0.75 90 -1.0251 1.3045 0.0989 0.75 102 1.1651 1.3896 0.1112 0.75 246 0.305 1.1653 0.0411 0.75 258 1.9178 1.0464 0.1788 0.75 282 -0.5555 1.0795 0.0592 0.85 102 -0.6028 1.596 0.063 0.85 114 0.4105 1.4971 0.0482 0.85 222 0.0814 1.3529 0.0309 0.85 246 1.7908 1.3252 0.1673 0.85 258 -0.022 1.1481 0.0301 0.85 270 0.0808 1.2894 0.0309 0.85 282 -0.342 1.1144 0.0434 0.85 294 -0.8486 1.0488 0.0836 0.95 246 -0.6305 3.7243 0.0652 0.95 282 -7.9673 2.7402 0.7328 0.95 294 -1.129 3.5375 0.108 0.55 102 -0.1963 0.7622 0.0326 0.65 102 0.2531 0.6468 0.0342 0.65 258 -0.9471 0.7357 0.0685 0.75 90 1.6623 0.5682 0.1122 0.75 102 -0.3894 0.6305 0.0393 0.75 114 -0.4166 0.7757 0.0404 0.75 246 -1.6568 0.5754 0.1119 0.75 258 0.8949 0.744 0.0655 0.75 270 0.6096 0.7575 0.0497 0.85 102 1.7166 0.636 0.1156 0.85 210 -0.2889 0.9255 0.0354 0.85 234 -1.4623 0.881 0.0997 0.85 246 0.7795 0.8329 0.0589 0.85 258 -0.106 0.7281 0.0308 0.85 270 -0.7737 0.7319 0.0586 0.85 282 -0.0173 0.6126 0.03 0.95 282 1.0785 1.0095 0.0763 0.95 294 1.1111 1.1079 0.0783 0.95 306 1.1565 1.0763 0.081