CLAS physics database search results Measurement E151M1764 EG4 Xiaochao Zheng 2016 cos(theta_pi+) phi(pi+) A_LL Stat. error Syst. error degrees 0.35 66 0.0147 0.6043 0.03 0.55 270 -0.3359 0.7911 0.0363 0.65 102 0.3886 0.6928 0.0381 0.65 270 0.9338 0.6884 0.064 0.75 78 -0.5371 0.7586 0.0443 0.75 90 1.5382 0.5697 0.0979 0.75 102 0.1753 0.5614 0.0318 0.75 114 0.2569 0.7345 0.0338 0.75 234 0.2311 0.7758 0.0331 0.75 246 -0.2937 0.7149 0.0349 0.75 258 -1.2254 0.5437 0.0801 0.75 270 -0.9414 0.5498 0.0645 0.75 282 -0.7436 0.6192 0.0541 0.75 294 0.8066 0.6011 0.0574 0.85 90 0.9428 0.5081 0.0645 0.85 102 -1.0233 0.4888 0.0689 0.85 114 0.1667 0.6232 0.0317 0.85 126 1.1915 0.6981 0.0782 0.85 138 0.265 0.7128 0.034 0.85 222 0.9622 0.7014 0.0656 0.85 234 0.924 0.6037 0.0635 0.85 246 -0.5858 0.5584 0.0465 0.85 258 -0.188 0.6124 0.0321 0.85 270 -0.072 0.6698 0.0303 0.85 282 0.1337 0.5225 0.0311 0.85 294 -0.4277 0.5156 0.0396 0.85 306 -0.3546 0.7458 0.0369 0.95 102 1.1022 0.6531 0.0732 0.95 114 0.1187 0.66 0.0308 0.95 126 0.9289 0.6187 0.0638 0.95 246 -0.0437 0.6428 0.0301 0.95 258 0.289 0.4784 0.0347 0.95 270 -0.0666 0.6207 0.0303 0.95 282 0.1285 0.5415 0.031 0.95 294 0.6493 0.6171 0.0495