CLAS physics database search results Measurement E151M1826 EG4 Xiaochao Zheng 2016 cos(theta_pi+) phi(pi+) A_LL Stat. error Syst. error degrees 0.25 282 0.3728 0.7372 0.0376 0.35 78 0.0462 0.8259 0.0301 0.35 282 -1.4392 0.6785 0.0922 0.35 294 -0.335 0.6967 0.0362 0.45 282 -1.1438 0.7371 0.0755 0.55 102 1.5121 0.7196 0.0964 0.55 306 2.0348 0.6662 0.1269 0.65 90 -1.1908 0.8079 0.0781 0.65 102 -0.0832 0.6646 0.0304 0.65 114 -0.6389 0.901 0.049 0.65 126 1.5361 0.661 0.0978 0.65 234 -0.2695 0.7631 0.0342 0.65 246 -0.1019 0.8434 0.0306 0.75 90 1.2169 0.6899 0.0796 0.75 102 1.0846 0.6581 0.0722 0.75 114 0.3803 0.713 0.0378 0.75 126 0.8835 0.6554 0.0614 0.75 222 -0.0315 0.8407 0.0301 0.75 234 1.0065 0.6872 0.068 0.75 246 -0.1373 0.828 0.0311 0.75 258 0.6659 0.668 0.0503 0.75 270 -0.3603 0.7632 0.0371 0.85 66 0.8176 0.8003 0.0579 0.85 78 1.3404 0.7183 0.0866 0.85 102 1.1349 0.7539 0.075 0.85 114 0.3517 0.6462 0.0368 0.85 126 -0.8628 0.7106 0.0603 0.85 138 0.9875 0.7115 0.0669 0.85 222 0.3834 0.6694 0.0379 0.85 234 0.5443 0.6081 0.0446 0.85 246 0.9092 0.6184 0.0627 0.85 258 -0.28 0.5994 0.0345 0.85 270 -0.7287 0.6009 0.0534 0.95 222 0.7072 0.7153 0.0523 0.95 258 1.1426 0.6321 0.0755 0.95 270 0.9426 0.7296 0.0645 0.95 282 -0.4504 0.5946 0.0406 0.95 294 0.152 0.6354 0.0314