CLAS physics database search results Measurement E151M1905 EG4 Xiaochao Zheng 2016 cos(theta_pi+) phi(pi+) A_LL Stat. error Syst. error degrees 0.35 78 0.6984 0.716 0.0519 0.35 282 0.8156 0.7891 0.0578 0.45 18 0.4287 0.8431 0.0397 0.45 258 -0.4961 0.6856 0.0425 0.45 270 -1.3745 0.6438 0.0885 0.45 282 -0.6396 0.8007 0.049 0.55 78 -0.7126 0.8248 0.0526 0.55 126 -0.8137 0.6907 0.0577 0.55 210 -0.3018 0.8059 0.0351 0.55 258 1.5436 0.7212 0.0982 0.55 270 0.2755 0.6827 0.0343 0.55 282 -2.0996 2.0996 0.1307 0.65 126 -0.5305 0.7692 0.044 0.65 138 -0.9329 0.7664 0.064 0.65 150 -0.5102 0.8484 0.0431 0.65 210 -1.0839 0.7501 0.0722 0.65 222 0.3182 0.7988 0.0357 0.65 294 1.2237 0.7165 0.08 0.75 66 1.0119 0.7618 0.0683 0.75 126 -0.3813 0.8071 0.0379 0.75 210 -0.6462 0.7961 0.0493 0.75 222 -0.2154 0.7093 0.0327 0.75 234 0.6248 0.7111 0.0483 0.75 258 0.3233 0.7408 0.0358 0.75 270 -1.1623 0.5535 0.0766 0.75 282 0.4173 0.7054 0.0392 0.85 114 0.1208 0.6639 0.0309 0.85 126 0.6032 0.654 0.0473 0.85 198 -0.8971 0.8116 0.0621 0.85 210 -1.0525 0.5939 0.0705 0.85 222 0.5541 0.7122 0.045 0.85 234 -0.3739 0.765 0.0376 0.85 258 -0.2244 0.7811 0.0329