CLAS physics database search results Measurement E151M447 EG4 Xiaochao Zheng 2016 cos(theta_pi+) phi(pi+) A_UL Stat. error Syst. error degrees 0.55 222 -0.2254 0.5366 0.0382 0.65 150 -0.1212 0.6072 0.0309 0.65 222 -0.2324 0.6127 0.0333 0.75 234 0.4003 0.603 0.0389 0.85 138 0.4063 0.6899 0.0392 0.85 150 0.1749 0.7496 0.0319 0.85 222 0.5959 0.6787 0.0476 0.85 234 -0.1585 0.7122 0.0316 0.85 246 -0.2185 0.6711 0.0329 0.65 234 -0.512 0.8738 0.043 0.65 246 -0.4595 0.9978 0.0408 0.75 222 0.7514 1.2611 0.0543 0.75 234 -0.1479 1.021 0.0313 0.85 234 1.7551 1.4069 0.1099