CLAS physics database search results Measurement E151M1883 EG4 Xiaochao Zheng 2016 cos(theta_pi+) phi(pi+) A_LL Stat. error Syst. error degrees 0.45 270 -1.2437 0.8635 0.0811 0.45 282 0.3456 0.9518 0.0366 0.45 294 -0.0923 0.9053 0.0305 0.55 114 -0.6047 0.9281 0.0474 0.55 126 0.2308 0.848 0.0331 0.55 282 -1.3773 0.9196 0.0887 0.65 114 0.5857 0.9483 0.0465 0.65 126 1.0261 0.9378 0.069 0.65 138 0.0737 1.0051 0.0303 0.65 294 -1.1554 0.739 0.0762 0.75 114 0.6235 0.9654 0.0482 0.75 126 0.317 0.9778 0.0356 0.75 198 0.7759 0.8981 0.0558 0.75 210 -1.4552 0.8151 0.0931 0.75 222 0.2372 0.8505 0.0333 0.75 234 0.5117 0.826 0.0431 0.75 246 -0.765 0.9302 0.0552 0.85 90 -1.7761 0.6858 0.1117 0.85 222 -0.9801 0.737 0.0665 0.85 234 -0.1521 0.6693 0.0314 0.95 114 -0.7837 0.8004 0.0562 0.95 222 -0.0272 0.7363 0.03 0.95 234 0.36 0.812 0.0371 0.95 258 -0.7984 0.7872 0.0569