CLAS physics database search results Measurement E151M1157 EG4 Xiaochao Zheng 2016 cos(theta_pi+) phi(pi+) A_UL Stat. error Syst. error degrees 0.85 78 -0.0934 0.8727 0.0308 0.85 90 -0.3688 0.8171 0.0403 0.85 210 -0.5519 0.7947 0.0503 0.85 234 -0.2805 0.8078 0.0363 0.85 246 0.7171 0.9036 0.0604 0.95 186 0.5118 0.9568 0.048 0.95 198 0.532 0.7727 0.0491 0.95 210 -0.3923 0.791 0.0415 0.95 222 1.1811 0.9438 0.0914 0.95 234 0.6298 0.9023 0.0549 0.95 246 0.0011 0.796 0.03 0.95 258 0.1428 0.7768 0.0318 0.95 282 0.1624 0.8287 0.0323