CLAS physics database search results Measurement E151M665 EG4 Xiaochao Zheng 2016 cos(theta_pi+) phi(pi+) A_UL Stat. error Syst. error degrees 0.65 114 -1.0053 0.6795 0.0684 0.75 126 -0.5661 0.7225 0.0458 0.75 210 0.578 0.8031 0.0464 0.85 90 0.3582 0.7673 0.0371 0.85 234 0.3559 0.7326 0.0371 0.85 258 0.3016 0.7508 0.0352 0.95 222 0.1591 0.7328 0.0315