CLAS physics database search results Measurement E151M1779 EG4 Xiaochao Zheng 2016 cos(theta_pi+) phi(pi+) A_LL Stat. error Syst. error degrees 0.35 78 0.151 0.758 0.0314 0.65 90 0.6864 0.8652 0.0513 0.65 102 -0.9359 0.6704 0.0642 0.65 246 1.1497 0.6824 0.0758 0.65 258 -0.5381 0.7606 0.0443 0.65 270 0.1715 0.6643 0.0317 0.75 78 0.9839 0.7895 0.0667 0.75 90 -0.2454 0.7799 0.0335 0.75 102 -0.0783 0.6493 0.0304 0.75 114 0.8716 0.7838 0.0607 0.75 234 0.7734 0.6813 0.0556 0.75 246 0.3964 0.7014 0.0384 0.75 258 0.7192 0.6311 0.0529 0.75 270 -1.1078 0.6014 0.0735 0.75 282 -0.2455 0.7615 0.0335 0.85 66 0.1323 0.8287 0.0311 0.85 90 0.9272 0.6806 0.0637 0.85 102 0.8949 0.6959 0.062 0.85 114 1.049 0.6683 0.0703 0.85 126 0.627 0.6299 0.0484 0.85 138 1.5043 0.7085 0.096 0.85 222 0.1526 0.6597 0.0314 0.85 234 0.0992 0.7469 0.0306 0.85 246 0.1585 0.5238 0.0315 0.85 258 -0.7412 0.5737 0.054 0.85 270 -0.0997 0.5771 0.0306 0.85 282 0.3555 0.5928 0.0369 0.85 294 -0.0874 0.8064 0.0305 0.95 114 0.8191 0.6681 0.058 0.95 138 0.4565 0.7301 0.0408 0.95 234 0.3847 0.6425 0.038 0.95 246 -0.4289 0.661 0.0397 0.95 258 -0.2823 0.606 0.0345 0.95 270 1.0178 0.5116 0.0686 0.95 282 0.4979 0.5497 0.0425 0.95 294 0.2908 0.5242 0.0348