CLAS physics database search results Measurement E151M405 EG4 Xiaochao Zheng 2016 cos(theta_pi+) phi(pi+) A_UL Data errors Systematic errors degrees 0.45 30 -1.2925 0.5949 0.0834 0.45 42 0.5895 0.6085 0.0471 0.45 222 0.7948 0.5748 0.0574 0.55 138 -0.0808 0.6765 0.0304 0.55 150 -0.6009 0.686 0.0478 0.55 210 0.7015 0.6617 0.0528 0.55 222 0.2888 0.6227 0.0349 0.55 234 0.132 0.5955 0.0311 0.65 138 0.0173 0.6759 0.03 0.65 150 -0.6003 0.6557 0.0478 0.65 210 0.9803 0.5607 0.0677 0.65 222 -0.663 0.6104 0.0508 0.75 222 0.4406 0.5805 0.0405 0.75 234 -0.1731 0.5644 0.0319 0.85 126 0.6688 0.7045 0.0511 0.85 138 0.0504 0.6609 0.0302 0.85 222 0.2559 0.6407 0.0339 0.85 234 -0.075 0.5734 0.0304 0.45 234 1.9552 1.2911 0.1215 0.55 138 0.2074 1.0984 0.0325 0.55 210 0.7873 1.2103 0.0561 0.55 222 1.4728 1.5043 0.0936 0.55 234 -0.2121 0.6909 0.0326 0.65 138 1.0365 1.282 0.0693 0.65 222 -0.8812 0.5832 0.061 0.65 234 0.3168 0.8458 0.0356 0.75 210 0.1216 0.9999 0.0309 0.75 222 0.6545 0.9619 0.0495 0.75 234 0.1856 0.9758 0.032 0.85 222 0.2017 0.9516 0.0324 0.85 234 -0.2853 0.9111 0.0346