CLAS physics database search results Measurement E151M871 EG4 Xiaochao Zheng 2016 cos(theta_pi+) phi(pi+) A_UL Stat. error Syst. error degrees 0.35 78 -0.9071 0.6312 0.0667 0.45 78 -1.14 0.5732 0.0806 0.45 126 -0.026 0.7907 0.03 0.45 282 -0.6845 0.6118 0.054 0.55 78 -0.018 0.7196 0.03 0.55 114 -0.7503 0.721 0.0577 0.55 126 -1.438 0.6487 0.099 0.55 270 0.4047 0.7852 0.0401 0.65 126 1.1461 0.8673 0.081 0.65 138 -0.8265 0.6713 0.062 0.65 210 -0.1396 0.7353 0.0314 0.65 222 1.7138 0.7923 0.1164 0.75 114 -0.3646 0.7955 0.0384 0.75 126 1.3119 0.8552 0.0912 0.75 138 -0.5124 0.7091 0.0451 0.75 222 0.0273 0.6856 0.0301 0.75 234 0.6016 0.8577 0.0496 0.75 282 0.8486 0.8115 0.0633 0.85 102 -0.8018 0.7962 0.0606 0.85 114 -0.9653 0.7588 0.0701 0.85 210 -0.451 0.8147 0.0421 0.85 222 0.6342 0.7626 0.0513 0.85 234 1.1961 0.8537 0.084 0.35 270 0.3575 0.7156 0.0446 0.45 78 0.1335 0.7497 0.0324 0.55 126 -0.5009 0.8076 0.0551 0.55 138 -0.9214 0.7211 0.0902 0.55 282 0.3388 0.7471 0.0433 0.65 138 -1.0016 0.7204 0.0972 0.65 222 1.5969 0.828 0.1504 0.75 66 -0.8438 0.783 0.0835 0.75 126 -0.4114 0.906 0.0484 0.75 234 0.8688 0.8272 0.0856 0.75 282 -0.3345 0.7085 0.043 0.85 102 -0.9471 0.8435 0.0924 0.85 114 -0.0213 1.0496 0.0301 0.85 222 0.0481 0.9365 0.0303 0.85 234 0.9686 0.9506 0.0943