CLAS physics database search results Measurement E151M2808 EG4 Xiaochao Zheng 2016 cos(theta_pi+) phi(pi+) A_LU Stat. error Syst. error degrees 0.65 126 -0.3374 0.4311 0.0307 0.65 246 -0.0531 0.3665 0.03 0.75 222 0.3004 0.3864 0.0306 0.75 234 0.4971 0.3047 0.0316 0.75 246 -0.2191 0.3074 0.0303 0.75 258 -0.7653 0.198 0.0337 0.75 270 -0.0625 0.3239 0.03 0.85 234 0.3929 0.3618 0.031 0.85 246 -0.1205 0.3394 0.0301 0.85 258 -0.0286 0.3878 0.03 0.85 270 -0.1293 0.3628 0.0301 0.85 282 0.1994 0.3961 0.0303 0.95 78 0.0168 0.3483 0.03 0.95 246 -0.5672 0.3358 0.0321 0.95 270 -0.5584 0.389 0.032 0.95 282 -0.3231 0.3879 0.0307 0.55 258 -0.321 0.2688 0.0307 0.65 258 -0.0296 0.279 0.03 0.75 126 0.0312 0.2296 0.03 0.75 138 0.4684 0.2372 0.0314 0.75 222 -0.0604 0.2717 0.03 0.75 258 -0.324 0.2284 0.0307 0.75 270 0.0761 0.2811 0.03 0.85 246 -0.1635 0.258 0.0302 0.85 270 -0.0288 0.2783 0.03 0.85 282 -0.2907 0.2397 0.0306 0.95 282 -0.137 0.2791 0.0301