CLAS physics database search results Measurement E151M930 EG4 Xiaochao Zheng 2016 cos(theta_pi+) phi(pi+) A_UL Stat. error Syst. error degrees 0.65 282 0.1638 0.5637 0.0319 0.75 222 0.5675 0.7472 0.0478 0.85 114 0.3772 0.7082 0.0389 0.85 210 0.5257 0.7661 0.0457 0.85 222 -1.1914 0.6381 0.0837 0.65 294 0.4712 0.6956 0.0528 0.75 270 -0.1602 0.647 0.0334 0.75 282 0.6533 0.7419 0.0673 0.85 210 1.0823 0.8585 0.1043