CLAS physics database search results Measurement E151M1146 EG4 Xiaochao Zheng 2016 cos(theta_pi+) phi(pi+) A_UL Stat. error Syst. error degrees 0.85 66 -0.5511 0.75 0.0502 0.85 186 0.0727 0.9134 0.0305 0.85 210 -1.0171 0.7171 0.0802 0.85 246 1.1017 0.8665 0.0859 0.95 234 1.0923 0.886 0.0853 0.95 246 -0.4414 0.7 0.0441 0.95 270 -0.0888 0.6978 0.0307 0.95 294 -0.0456 0.6864 0.0302