CLAS physics database search results Measurement E151M1168 EG4 Xiaochao Zheng 2016 cos(theta_pi+) phi(pi+) A_UL Stat. error Syst. error degrees 0.75 90 0.3865 0.8938 0.0412 0.85 78 -0.4267 0.8707 0.0433 0.85 90 -0.1218 0.8989 0.0313 0.85 102 -0.3586 0.8347 0.0398 0.85 186 1.5766 0.9419 0.1191 0.85 198 -0.6515 0.8452 0.0563 0.85 210 1.0901 0.911 0.0851 0.85 222 2.3087 0.9558 0.1714 0.85 234 -0.2596 0.7097 0.0355 0.95 186 1.1082 0.8577 0.0864 0.95 198 0.8243 0.9481 0.0673 0.95 210 0.8541 0.9249 0.0693 0.95 234 0.4196 0.7272 0.0429 0.95 246 -0.9521 0.5772 0.0758 0.95 258 1.6955 0.9461 0.1275