CLAS physics database search results Measurement E151M1856 EG4 Xiaochao Zheng 2016 cos(theta_pi+) phi(pi+) A_LL Stat. error Syst. error degrees 0.45 282 0.8349 0.844 0.0588 0.65 114 1.1502 0.7778 0.0759 0.65 234 -0.5081 0.8765 0.043 0.65 246 -0.0833 0.9637 0.0304 0.75 102 0.9003 0.8286 0.0623 0.75 114 0.5564 0.7876 0.0451 0.75 138 -1.0317 0.8571 0.0693 0.75 222 0.1121 0.7287 0.0308 0.75 234 0.5279 0.7268 0.0439 0.75 246 -0.6304 0.8286 0.0486 0.75 258 0.3269 0.8695 0.0359 0.85 78 -0.1621 0.8022 0.0316 0.85 138 -0.2593 0.9182 0.0339 0.85 210 -1.2461 0.8348 0.0812 0.85 222 0.325 0.7887 0.0359 0.85 234 0.1289 0.815 0.031 0.85 246 -1.4825 0.6489 0.0947 0.85 258 -0.0105 0.8023 0.03 0.85 270 0.6691 0.8206 0.0504 0.95 234 -0.5813 0.774 0.0463 0.95 258 -0.0023 0.6991 0.03 0.95 270 -0.752 0.7134 0.0546 0.95 282 0.0569 0.6674 0.0302