CLAS physics database search results Measurement E151M1650 EG4 Xiaochao Zheng 2016 cos(theta_pi+) phi(pi+) A_LL Stat. error Syst. error degrees 0.55 138 1.2026 0.9413 0.0781 0.55 246 -1.2642 0.91 0.0815 0.65 222 0.015 0.9575 0.03 0.65 234 -1.5093 0.8126 0.0953 0.65 246 0.5726 0.8977 0.0456 0.75 162 0.7827 0.9317 0.0557 0.75 210 -0.5861 1.0046 0.0462 0.75 222 -1.1458 0.8255 0.0749 0.75 234 0.6602 0.813 0.0497 0.85 138 -2.2069 0.8573 0.1356 0.85 222 -0.6623 0.7729 0.0498 0.85 234 -0.8442 0.8626 0.0588 0.85 246 0.7777 0.8334 0.0554 0.35 42 -0.2841 1.32 0.0342 0.45 222 -0.6653 1.1855 0.049 0.55 222 2.4822 2.4822 0.1474 0.55 234 -0.9189 1.0118 0.0613 0.65 138 -1.1805 1.1517 0.0749 0.65 150 -0.258 1.4443 0.0335 0.65 210 0.7658 1.1418 0.0537 0.65 222 2.6556 2.6556 0.1573 0.65 234 -0.0929 1.2296 0.0305 0.65 246 -2.0442 0.6661 0.1226 0.75 222 -1.1609 1.0136 0.0739 0.75 234 -1.1767 0.9796 0.0747 0.75 246 -1.1208 1.3543 0.0717 0.85 150 -0.5335 1.4152 0.0432 0.85 210 -0.8389 1.2047 0.0573 0.85 222 0.6771 0.8584 0.0495 0.85 234 -0.0208 1.1293 0.03 0.85 246 -0.9136 1.1357 0.061