CLAS physics database search results Measurement E151M1010 EG4 Xiaochao Zheng 2016 cos(theta_pi+) phi(pi+) A_UL Stat. error Syst. error degrees 0.55 78 0.7659 0.7783 0.0635 0.55 90 -0.6799 0.6759 0.058 0.55 270 -0.7038 0.6358 0.0595 0.65 78 -0.881 0.6564 0.071 0.65 90 -0.7964 0.6384 0.0655 0.65 102 0.6219 0.8748 0.0545 0.65 258 -0.8057 0.6375 0.0661 0.75 78 0.0813 0.7639 0.0306 0.75 90 -0.2445 0.6245 0.0349 0.75 102 0.6387 0.8694 0.0555 0.75 258 0.2826 0.8353 0.0364 0.75 282 -0.5788 0.6587 0.0519 0.75 294 0.2226 0.7132 0.0341 0.85 78 0.0042 0.7745 0.03 0.85 90 1.5304 0.8972 0.1158 0.85 102 -0.636 0.6545 0.0553 0.85 114 -0.7121 0.6697 0.0601 0.85 222 -0.8884 0.6101 0.0715 0.85 234 -0.1245 0.7046 0.0313 0.85 246 -0.1755 0.6488 0.0326 0.85 270 0.1029 0.7062 0.0309 0.85 282 -0.6215 0.5049 0.0544 0.85 294 -0.6127 0.5597 0.0539 0.85 306 -0.7933 0.5076 0.0653 0.85 318 -0.5639 0.5799 0.051 0.85 330 -0.3573 0.6477 0.0398 0.95 222 -0.0667 0.7132 0.0304 0.95 258 0.6392 0.7548 0.0555 0.95 270 0.2169 0.6276 0.0339 0.95 282 0.2851 0.6978 0.0365