CLAS physics database search results Measurement E151M1814 EG4 Xiaochao Zheng 2016 cos(theta_pi+) phi(pi+) A_LL Stat. error Syst. error degrees 0.35 78 -0.8838 0.792 0.0614 0.35 282 -1.4841 0.69 0.0948 0.45 66 0.0744 0.8198 0.0303 0.45 78 0.7498 0.6169 0.0544 0.45 90 1.0183 0.6679 0.0686 0.45 270 1.4203 0.6365 0.0911 0.45 282 0.0721 0.6338 0.0303 0.45 294 -1.165 0.7308 0.0767 0.55 78 0.3199 0.6518 0.0357 0.55 90 -0.3654 0.8992 0.0373 0.55 126 -1.0085 0.8417 0.0681 0.55 138 0.8856 0.7506 0.0615 0.55 222 0.4578 0.6737 0.0409 0.55 234 -0.3159 0.6288 0.0356 0.55 270 0.345 0.7962 0.0366 0.55 282 -0.8678 0.6288 0.0605 0.55 294 -1.0935 0.6532 0.0727 0.65 114 -1.4748 0.7128 0.0943 0.65 126 -0.2086 0.6838 0.0326 0.65 150 0.5885 0.7912 0.0466 0.65 210 0.6441 0.7794 0.0492 0.65 222 0.8663 0.7205 0.0605 0.65 234 -0.7172 0.5501 0.0528 0.65 246 -0.3723 0.7331 0.0375 0.75 78 1.2192 0.8166 0.0797 0.75 114 -1.4093 0.64 0.0905 0.75 126 0.3645 0.6879 0.0373 0.75 138 -0.083 0.779 0.0304 0.75 150 -0.5366 0.8053 0.0442 0.75 198 1.0148 0.7708 0.0684 0.75 222 -0.4483 0.5818 0.0405 0.75 234 0.0086 0.6195 0.03 0.75 246 1.8929 0.6043 0.1186 0.75 282 0.8172 0.7784 0.0579 0.85 210 -1.6318 0.7069 0.1033 0.85 222 0.7852 0.688 0.0562 0.85 234 -0.5 0.6107 0.0426 0.85 246 0.504 0.7072 0.0428