CLAS physics database search results Measurement E151M1636 EG4 Xiaochao Zheng 2016 cos(theta_pi+) phi(pi+) A_LL Stat. error Syst. error degrees 0.55 138 -0.5243 0.9061 0.0434 0.55 210 -0.9894 1.2807 0.0649 0.55 222 -1.0861 0.6281 0.0868 0.55 234 -0.2525 0.7896 0.0559 0.55 246 -0.4104 0.6339 0.0397 0.65 138 0.5185 0.6116 0.0598 0.65 150 0.0235 0.636 0.0302 0.65 162 0.303 0.8528 0.0351 0.65 210 -0.9251 0.9442 0.0616 0.65 222 -0.8945 0.574 0.0612 0.65 234 -1.4545 0.4725 0.0909 0.65 246 0.6189 0.6378 0.0493 0.75 138 -1.3678 0.6982 0.0873 0.75 150 0.1686 0.9244 0.0317 0.75 162 0.9725 0.9145 0.0656 0.75 222 -0.7956 0.7047 0.0558 0.75 234 0.1461 0.6383 0.0337 0.75 246 -0.8034 0.5637 0.0569 0.85 222 0.687 0.8778 0.0509 0.85 234 -1.1903 0.7908 0.0774 0.85 246 -0.1214 0.8304 0.0309 0.95 114 -0.5788 0.8696 0.0459 0.95 126 -0.6716 0.8401 0.0502 0.95 234 1.5783 0.7404 0.0992 0.75 258 0.899 0.9474 0.0603 0.85 222 -0.7132 1.196 0.0512 0.85 234 -1.2649 0.719 0.0794 0.85 246 1.7508 0.6998 0.1061 0.85 258 -0.8988 1.1575 0.0603